câu 47:

C1:The water was very cold so the children could not swimming.

C2:Because the water was very cold, the children could not swimming.

C3:Because of the cold water, the children could not swimming.

câu 55:

What is wrong with your car?

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47.The water was very cold so we couldn't go swimming

48.Don't forget to wake me up at eight tomorrow morning

49.You were reading books in the library between 9 and 10 yesterdaa=y morning, weren't you?

50.You didn't watch the TV last night, did you?

51.I am fond of going to the cinema with friends at the weekeng.

52.Ann is a dangerous driver.

53.You don't have to finish all your homework today.

54.How much do these rackets cost?

55.What's wrong with your car?