1.That can be very costly.(cost đề viết sai)

2.She has given up smoking since last year.

3.Because there was a heavy rain, we couldn't go to school this morning. 

4.Susan said that she was very busy, she would ring me the next day/the following day.

5.She doesn't get used to getting up early in the morning.

6.Minh is the most intelligent in my class.

7.The last time we saw her was when we left university.

 Jess and Ruby had a choice - they could return the money or keep it themselves. Between the two choices, Ruby wanted to keep it as a reward, but Jess didn't agree. While they were argueing(ko bt gõ đúng ko:v), a police came across and saw two holding a thing just like a missing wallet he was reported to find along with the money, he asked two of them if they had picked it up or it was just a sudden misunderstanding, and they both had to tell the truth and returned it to the owner.