1,a.coffee b.pot c.bottle d.one ->gạch chân o

2,a.hat b.map c,what d,cap ->gạch chân a

3,what b.yogurt c.problem d,morning

4, a.was b.wall c.walk d,water ->gạch chân a

5.a talk b.salt c.sausage d.cause ->gạch chân a

A, nha 

K nha

=> Chọn A

Ta có: \(\left\{{}\begin{matrix}SA\perp\left(ABCD\right)\Rightarrow SA\perp BD\\BD\perp AC\text{(hai đường chéo hình thoi)}\end{matrix}\right.\) \(\Rightarrow BD\perp\left(SAC\right)\)

\(SA\perp\left(ABCD\right)\Rightarrow\widehat{SCA}\) là góc giữa SC và (ABCD)

\(tan\widehat{SCA}=\dfrac{SA}{AC}=\sqrt{3}\Rightarrow\widehat{SCA}=60^0\)

*) Talk about ways to save energy:

As you know, our energy has limitation, so we must save energy because of the following ways. Firstly, we have to turn off the electric appliances when we do not use them. Secondly, by using bicycle or public transports instead of motorbikes or cars. Finally, we should not throw all used papers and bottles. I suggest collecting them to reuse and recycle. Therefore, if we follow the above ways, we will not only save money but also conserve the energy.

Talk about the main of transport in the future:

I believe that in 20 years the cars we drive will not be that different. I think most of the cars will move away from traditional fuel sources, but for the most part, will remain unchanged. I think the biggest problem we face isn't changing the vehicle itself, but the infrastructure that it depends on. I believe in the next century we will see a change in the road systems which will allow for greater density of vehicles, reducing the amount of space needed for roads and highways. Americans want a vehicle that can go anywhere, off road, on a race track, or down the freeway, and I believe in the future we will have multiple cars for different uses. One car for cruising around town, probably a fully electric vehicle, and another for commuting and urban driving. For those who still crave a little dirt under their tires, I think there will always be traditional Jeeps, trucks, etc. We will always have a large need for construction equipment, and I don't see those vehicles changing, other than by converting to cleaner fuels. I also believe that before 2050, self-driving cars will be coming on the market. If a 'track' system, or some system of guidance were implemented on major thoroughfares and in urban areas, a commuter could simply pull onto the freeway and switch to autopilot. This would allow cars to flow in a much more organized fashion, allowing higher speeds, safer roads, and fewer emissions caused by road congestion. The other thing I see increasing is the use of air travel. If aircraft could be made easy enough to fly by the average Joe, with a licensing system equivalent to the DMV, I believe more people would travel by air. Whatever happens, I believe or streets will be safer to drive on, and our cars will be more fun to ride in.

CLOSEST in meaning

1. If my mother were here, she would prepare breakfast for me immediately .

A. Currently

B. Right ahead

C. Formerly

D. Right away: ngay lập tức

2. If she had taken my sage advise, she wouldn't fall into a predicament now.

A. Willing

B. Sturdy

C. Wise: khôn ngoan, chín chắn

D. Eager

Topic

1) Talk about your hobby / hobbiest

I have an unusual hobby : carving eggsells . I started this hobby four years ago after getting a carved eggshells from my dad when he came back from Spain . It’s amazing that something as fragile as an empty eggshell can be made into such a beautiful piece of art . I was so amazed that I learned how to carve them myself from the internet . I find carving eggsells a little difficult but so interesting and useful . The felling of accomplishment when I finish a piece is absolutely awesome. This hobby also helps me be more patient and careful.

4)

1) Talk about volunteer work you want to do

Being a volunteer is one of the best things you can do with your life . It’s a great way to help other people . It’s also very satisfying to know that you are not wasting your time and are helping people who need help . I like volunteer work .

I and my friends often take part in childrens program . This is a program which help orphans , street children and mentally / physically disabled chidren in our town to have better life . We often visit them on Saturday at house of gratitude . We give them presents such as fruit , candy , cakes , old clothes and so on . We teach them to learn about many things in life , tell with them funny and meaningful stories, etc so that they can fall in the line with society without and complex . They’re very hobby and like us . I think it’s really a useful activity .

I'm a third year student and in the mechatronic of Hanoi university of industry right now. After graduating from my university, I hope to find a good job with a good salary in an environment I could use my abilities. Of course, I also want to work in a foreign company, I think it's a good environment to develop my skills. I also want to earn much money from my work in the future, so I will work hard to earn a higher salary than expected. Now I live far away from my parents but I have to depend on them for everything. I love my parents and want to give them some money or other things to help them have a better life in future years when I have graduated. I want to find a part time job to earn extra money and to be in contact with the environment outside my university. In the future, when I have enough experience I'd like to build my own company. I will employ many people and give them work in order to contribute to the development of my country. I hope my dream comes true!

My neighbourhood is in tho country . It's not too big but it is very clean , beautiful and peaceful country , There are many houses , tall trees and many fields . The air is fresh and the fresh vegettables . The people in here are very hars - working and friendly . I love my neighbourhood so much

Em tham khảo nha:

My neighborhood is in a small commune(xã) called Pho Ninh village.

It is a residental area(khu dân cư)with a population(dân số) of about two thousand peope. My neighborhood is very modern and progressive(tiến bộ) . There are many concrete roads(đường bê tông) so it's easy to move, even in the rainy season. There are many green trees and flowers on the side of the path(lối đi bộ). The streets have fewer traffic jams and accidents than in the city. Most of houses now are brick houses instead of earthen ones. Our houses are eqipped by modern appliances such as TVs, fridges, washing machines, smartphones to access to Internet. The people live in my neighborhood are vey friendly, generous and hospitable(hiếu khách). I think that my neighborhood is a great place to live in. In short, I love living in my neighborhood very much.

That's all. Thanks for watching!!!!!!!! Good luck to you!!!!!!!!