1、1．My clothes are out of style．

2．People often remember what they were doing when they heard the news of important events in history．

3．She said helping others changed her life．

4．I think I'll go to Hong Kong on vacation．

5．I went to Shanghai last year and fell in love with it．

6．I left my homework at home．

7．On the other hand，they need time to do things by themselves．

8．He became a national hero in China and became famous all over the world．

9．I was sorry to hear that he had a cold last week．

10．If you are famous，people will watch you all the time and follow you everywhere．