Fill in each blank with a suitable preposition.

51. There's been a big improvement _{………………}the children's behaviour.

52. Why don’t you lie _{………………}on the sofa a bit until you feel better.

53. The average costs of a new house go _{………………}by five percent to £276,500.

54. Nobody knows what the cause _{………………}the explosion was.

55. At the end of the film, it turned _{………………}that John was a good guy

Giúp mình vớii ạ!!

13. Do you know whos _____________ her children when she was out?
A. looking at   
B. looking after 
C. looking for
D. looking around
Giúp mình với ạ!! (Giải thích nếu có thể)

Câu 3: 

a, Làm tròn số sau đến hàng phần trăm: 23,457

b, Ước lượng kết quả các phép tính sau: 35,123.(-2,16)

Giúp mình với ạ!! 

I. Finish each of the following sentences in such a way that it means exactly the same as the original one.

1. I didn’t spend as much money as my friend did.

    My friend……………………………………………………………..…………………….

2. He couldn’t afford to buy a car.

     -The car…………………………………………………………………………………….

3. Your birthday party was the last time I really enjoyed myself.

     -I…………………………………………………………………………………………….

4.  It was so late that nothing could be done.

     -It was too……………………………………………………………………………………

5.   I 've never met such a famous person before.

     -It is the first time ……………………………………………………………………………

Giúp với ạ!!