Ha Long Bay is located in Quang Ninh province, northeastern Vietnam.There are many caves in Ha Long Bay such as: Trinh Nu cave, Dau Go cave, Luon cave, Kim quy cave, etc. Hạ Long bay's inhabitants have developed numerous tales explaining names given to various isles and caves in the bay.

Halong Bay (the bay where the dragon landed) is one of the west coast of the Gulf of Beibu Gulf in the South China Sea North Vietnam, including the islands of the Sea of ​​Halong City, Cam Pha Town and part of Van Don, Quang Ninh province.

Is the center of a large area with many factors similarities in geology, geomorphology, landscape, climate and culture, with Bai Tu Long Bay northeast of Cat Ba Island and the southwest, restricted area of ​​about 1,553 Ha Long Bay covers 1,969 square km large and small islands, mostly limestone islands, which are the core of the bay has an area of ​​335 km² island 775 dense capacitors . Tectonic history of Limestone Bay has spent about 500 million years to the ancient geographical circumstances are very different; Karst and evolution over 20 million in expenses with a combination of factors such as thick limestone floors, hot and humid climate and tectonic processes improve the overall slow . The combination of environment, climate, geology, geomorphology, Halong Bay has done to become the biodiversity of ecosystems including clusters of evergreen and banks tropical ecosystems and coastal moist marine ecosystems with more fundamental . 14 endemic plant species and 60 endemic animal species have been found among the thousands of resident flora and fauna Gulf.

These findings, archaeological exploration and cultural studies showed the presence of prehistoric inhabitants on Halong Bay quite early, made up of ancient cultural forms to include Soi Nhu culture between 18000-7000 BC, Cai Beo culture in 7000-5000 BC and Ha long culture today between 3500-5000 years . The process of building and protecting the people of Vietnam traditional country, along the history, also confirmed the position outpost and cultural status of Halong Bay through the website called is associated with an historical references handed down so far, such as Bai Tho mountain, Dau Go cave, Bai Chay etc. Currently, Ha Long Bay is a dynamically developing sector of the conditions and advantages available as a great potential for tourism, scientific research, aquaculture, fisheries, transport water for north east coast of Vietnam in particular and Vietnam in general north

From more than 500 years ago in Van Don poems entered Lo, Nguyen Trai was first praised Ha Long Bay is "sky high stone wonders" . 1962 Ministry of Culture - Information (Vietnam) Rated heritage Ha Long Bay and national plans and conservation areas . 1994 core area of ​​Ha Long Bay is a world heritage aesthetic value (criterion vii) natural UNESCO, and was re-accredited 2nd special global value local geological Appearance (viii standards ) in 2000 . Along with Nha Trang Bay and Lang Co Bay in Vietnam, Ha Long Bay is one of 29 Bay Club is the most beautiful bays in the world rankings and officially recognized in July 2003

Halong Bay and Cat Ba island formed one of 21 national tourist destinations Vietnam first. In 2015, the Cultural Heritage Bureau announced the number of tourists to Ha Long Bay is more than 2.5 million passengers.

An essential problem of the 21st century is world pollution. Currently the environment is so contaminated that urgent measures should be taken. A single individual cannot be blamed for the world pollution, however every person should take care of his or her habitat. In addition, it is vital that environmental issues are treated internationally.

Lately, many presentations, conferences and international summits are held to deal with waste treatment, recycling, and soil and water contamination. For sure joint efforts and consolidation can only help in the mutual war towards the ongoing environmental disaster. For instance, governments should offer support to companies and organizations, involved in manufacturing, industry or agriculture in order to find environment-friendly approaches. These could be special law regulations, recycling programs, helping courses in order to implement ISO certificates and many more.

However, the influence of individuals over environment should not be ignored. If we do not confess that our planet is our home, we will never be able to take adequately care of it. We have to contribute every day to the preservation of nature and environment. For example, always remember to save energy by switching off lamps, computers and everything that we do not use. Our next obligation is to separate waste and throw bulk only in the designated areas. Driving vehicles can also be environment friendly. For example, we have to avoid accelerating the engines too rapidly or using the air conditioning in the country, where it would be better to save energy and simply open the windows.

To sum up, environmental problems should be handled by local and international authorities as well as individuals. Every single person should take care of the environment, moreover we have to bring up our children to be conscious citizens of a clean and preserved planet.

Life is increasingly enhanced by the technology works, scientific - increasingly advanced technology to serve human life. But along with this development is the future consequences that the people we have to suffer because of lack of awareness about environmental protection. Environment is what surrounds us, from the same identical green lawns, winding rivers forever or the mountains on the horizon, they all live in a world that is around us. But the fact is that, man is the murderer took away his own life by making the environment more severely polluted, especially in big cities and industrial centers. Every school day die due to the lack of a sense of protection of natural resources, deforestation, indiscriminate green lung puncture of the World or the litter, waste, toxic gases from factories now out of the canal, and the atmosphere is one thing we are alarming. Environmental pollution has become a hot issue of humanity. Summit to be held in Brazil in 1992 made the whole world call to work together to protect the earth - our planet, building the green environment - clean - beautiful. Vietnam we have enacted policies that protect natural resources and is willing to work with countries around the world to protect the environment. Students we must also be aware of environmental hygiene, actively participating in movement activities like "Green Sunday" total hygiene schools, neighborhoods, join afforestation, no discharge litter public places ... in short, environmental protection is to protect our lives

chọn đáp án đúng:

1.would you like to drink tea?

no,thanhs/no,sorry/no,not now

2.my new school .......................many trees

has/have

3.there ...................a cinema and two shops

is/have/are

4.he listens ...................music everynight

of/to/about

5.tokyo is ..........................than london

big/bigger/biggest

1.no,thank

2.has

3.is

4.to

5.bigger

My house is located in a small quiet alley. That’s a pretty pink house which consists of 6 rooms in totally: a living room, a kitchen, a toilet, a bathroom and two bedrooms. There are a white leather sofa, a television and a sideboard in the living room. After dinner, my father will turn on the television, choose a great movie and we watch it happily. Next to the living room is the kitchen where is used for cooking and enjoying the meals. In the middle of the room is a dinner table which is made from wood. Three cookers, a refrigerator and all the neccesary stuff for cooking is arranged carefully in the right corner of the room. In the left of the kitchen is a clean toilet. Beside the toilet is the bathroom which is equipped a shower and a bathtub. There are only two rooms upstairs that is my parents’ room and my private room. I’ve decorated my bedroom with adorable wallpaper and many lovely stuffed animals. A single bed is placed next to the window so that I can stargaze before falling asleep. In the opposite of the bed are my desk and my bookshelf that contain many kinds of book. There are also an old television and a piano in my bedroom. I especially love the piano because that was the gift from dad in my birthday. In every Christmas or Tet holiday, all member of my family ornament the house together and then gather in the kitchen to cooking. Although my house is not too big but to me that is the most beautiful house in the world.

Dịch: Nhà của tôi nằm trong một con hẻm yên tĩnh. Đó là một ngôi nhà màu hồng rất dễ thương có tổng cộng 6 phòng: một phòng khách, một nhà bếp, một nhà vệ sinh, một phòng tắm và hai phòng ngủ. Trong phòng khách có bộ ghế sofa bằng da màu trắng, một chiếc tivi và một cái tủ trưng bày. Sau bữa cơm tối, bố tôi sẽ bật tivi, chọn một bộ phim thật tuyệt và chúng tôi cùng ngồi xem vui vẻ. Kế bên phòng khách là nhà bếp nơi được sử dụng để nấu ăn và ăn uống. Ở giữa phòng là một chiếc bàn ăn làm từ gỗ. Ba chiếc bếp, một cái tủ lạnh và tất cả những dụng cụ nấu ăn cần thiết đều được sắp xếp rất cẩn thận ở góc bên phải của phòng. Góc bên trái nhà bếp là một phòng vệ sinh sạch sẽ. Bên cạnh phòng vệ sinh là phòng tắm được trang bị vòi tắm hoa sen và bồn tắm. Có hai phòng ngủ ở trên lầu là phòng ngủ của bố mẹ và của tôi. Tôi trang trí phòng của mình bằng giấy dán tường rất ngộ nghĩnh và nhiều thú nhồi bông dễ thương. Chiếc giường đơn được đặt cạnh cửa sổ để tôi có thể ngắm sao trước khi chìm vào giấc ngủ. Đối diện giường là bàn học và kệ sách chứa rất nhiều loại sách. Trong phòng của tôi còn có một chiếc tivi cũ và một chiếc đàn piano. Tôi đặc biệt thích chiếc đàn piano bởi vì đó là món quà mà tôi tặng sinh nhật tôi. Vào mỗi dịp tết hay giáng sinh, tất cả thành viên trong gia đình đều cùng trang trí căn nhà và tập trung dưới bếp để nấu ăn. Mặc dù ngôi nhà của không lớn nhưng đối với tôi đó là ngôi nhà đẹp nhất trên thế giới này

Hello everyone! Today I'll tell you about my house. I live in a big house in the countryside and it is very beautiful. It has a living room, a kitchen, three bedrooms and two bathrooms. In the living room, there is a table, four chairs, a television and an air conditioner. My bedroom is very nice. There is a computer, a bed, a lamp and two pictures on the wall. And a bookshelf above the table, some teddy bears on the bed and a wardrobe. The kitchen has a refrigerator, a stove and a sink. Next to the kitchen is the bathroom. It has a shower, a washing machine and a tub. I love my house very much. 
 dịch

Chào mọi người! Hôm nay tôi sẽ kể cho bạn nghe về ngôi nhà của tôi . Tôi sống trong một ngôi nhà lớn ở nông thôn và nó rất đẹp. Căn hộ có phòng khách, nhà bếp, 3 phòng ngủ và 2 phòng tắm. Trong phòng khách, có một cái bàn, bốn cái ghế, một cái tivi và một cái máy lạnh. Phòng ngủ của tôi rất đẹp.Có một máy tính, một chiếc giường, một chiếc đèn và hai bức tranh trên tường. Và một giá sách trên bàn, một số gấu bông trên giường và tủ quần áo. Nhà bếp có tủ lạnh, bếp nấu ăn và bồn rửa. Bên cạnh nhà bếp là phòng tắm. Ngoài ra còn đi kèm vòi sen, máy giặt và bồn tắm. Tôi yêu ngôi nhà của tôi rất nhiều. 

I.make sentences using the words and phrases given

1.computer studies/nam's favorite subject

computer studies is nam's favorite subject

2.mrs thao/our teacher/english

mrs thao is our teacher of english

3.where/mr tan/live

where does mr tan live?

4.shall/introduce you my bets friend,an?

shall i introduce you my best friend, an?

5.trung/like/play soccer

trung likes playing soccer

1.Computer studies is Nam's favorite subject.

2.Mrs Thao is our teacher of English.

3.Where does Mr Tan live ?

4.Shall I introduce you my best friend , an ?

5.Trung likes playing soccer.

Chúc bn học tốt !!!⚽

Pélé was bom in 1940 in Brazil and he joined a Brazilian football club in 1956. Then six years later. he led the team to its first world club championship. He was the only player to participate in three World Cups in 1958,1962 and 1970. By 1974. he had scored 1,200 goals. And in 1975, he played for an American football club and he retired in 1977.

Pélé was bom in 1940 in Brazil and he joined a Brazilian football club in 1956. Then six years later. he led the team to its first world club championship. He was the only player to participate in three World Cups in 1958,1962 and 1970. By 1974. he had scored 1,200 goals. And in 1975, he played for an American football club and he retired in 1977.

chọn đáp án đúng:

1.i want (go/to go/going)swimming

2.we (should/shouln't/mustn't)wash our hands before the meal

3.this saturday we (is going/are going/go)to the art museum

4.he (is playing/do/is doing)judo with friends

5.the woman comes frow (japan/american/vietnamese

1: to go

2: should

3: are going

4: is doing

5: Japan

1.we don't go to school on saturay

2.he has lunch at school?

3.students muts clean the room

4.mike shouldn't stay uptate

5.he is skipping rope now

Chia động từ:

1. We (not go)to school on saturay.

=> We don't go to school on Saturday.

2. he (have)lunch at school?

=> Does he have lunch at school ?

3.students muts (clean)the room

=> Students must clean the room.

4.mike shouldn't (stay)up late.

=> Mike shouldn't stay up late.

5.he (skip)rope now

=> He is skipping rope now.

Đặt tích 3 số tự nhiên liên tiếp là A = a.(a+1)(a+2)

Để chứng minh A chia hết cho 2 có 2 trường hợp :

+) Nếu a chia hết cho 2 ( a chẵn ) => A chia hết cho 2 

+) Nếu A chia 2 dư 1 ( a lẻ ) => a+1 chia hết cho 2 => A chia hết cho 2 

Để chứng minh A chia hết cho 3 có 3 trường hợp :

+) Nếu A chia hết cho 3 => A chia hết cho 3 

+) Nếu A chia 3 dư 1 => a+2 chia hết cho 3 => A chia hết cho 3

+) Nếu A chia 3 dư 2 => a+1 chia hết cho 3 => A chia hết cho 3 

Mà 2 và 3 là 2 số nguyên tố cùng nhau nên :

A chia hết cho 6 hay 3 số tự nhiên liên tiếp chia hết cho 6