81, Our school has nearly 600 students

82. The Everest is the highest mountain in the world

83. Hung has two younger brothers

84. Learning English is very important now

85. Because of his sickness, he couldn't go to school yesterday 

86. The white shirt is cheaper than the red one

87. What is the length of this road?

88. It isn't necessary for us to do all the homework today

89. What is the price of the yellow school bag

90. This road will be widened by the end of this year.

làm nốt phần nào bạn ơi, phần trên mờ lắm, còn dưới là bài nghe mà

1 D

2 B

3 D

4 B

5 A

1 D

2 B

3 D

4 B

5 A

1.will be playing

2.have made

3.take

4.crashing

1 will be play

2 have made

3 take

4 crashing

I

1.What type of energy do you use at home?
2.John uses low energy light bulbs to save electricity.
3.Mai can't go to the cinema at present because she is studying for her exam.
4.What book are you currently reading?
5.She is not swimming in the swimming pool at the moment.
6.Scientists are looking for a new energy source to replace coal now

II.

1. Coal is more expensive and more polluting than natural gas.

2. We are looking for cheap and clean and effective sourced of energy..

3.. You should switch off electrical appliances when they aren’t in use.

4. Despite being the most polluting of fossil fuels, coal is still the largest sources of energy worldwide.

5. People will use biogas for fuel in homes and for transport

B. too

B

1, What would he like to have for breakfast?

He would like to have a sandwich

2,Who would you like to go fishing with?

I would like to go fishing with my father

3,What would her children like to do in the summer?

They would like to go swimming

4,When would Mrs Tam like to go shopping?

She would like to go shopping at weekends

5,Where would Hung and Tung like to study

They would like to study in the library

1 What would he like for breakfast? 

He'd like a sandwich

2 Who would you like to go fishing with?

I would like to go with my father

3 What would her children like to do in summer?

They would like to swim inpool

4 When would Mrs Tam like to go shopping?

She would like to go shopping on the weekends

5 Where would Tung and Hung like to study ?

THey would like to study in the school library

38. entertaining

39. characters

40. scenes

41. satisfy 

42. set

BÀI 1

1.a

2.c

3.d

4.d

8. entertainment

9. instrument

10. survey

11. models

12. organizations

13. community