1. A

2. B

3. C

4. D

6. A

7. B

8. B

9. D

10. C

Mình ko chắc đâu nhá 

1. b

2. b

3. a

4. c

5. b

He said that they were talking about a new invention. 

44. If you don't wake up, you will be late for school

45. yesterday, before she visited me, she had gone shopping

1. studying

2. to have

3. will be playing

4. won't dump

5. will be watching

6. were destroyed

7. had left

8. to turn

50.Unless he get up early,he will be late for school

49.If I were you, I would choose the blue car instead of the red car

Xong rồi nha bạn 

 Tom said that he wanted to buy a pocket calculator.

47. Soil pollution can be caused by littering rubbish

48. After they had visited Hue Citadel, they went to Hoi An

yes, i like it very much