21．一What’s the article about?　　　

-It tells us __________ about nature．

　　 A．something interesting　　　　　　　 B．interesting something

C．anything interesting　　　　　　　　 D．interesting anything

20．-I remember __________ you somewhere．

　　 -Yes．We met in Shanghai two years ago．

A．to meet　　　　　　 B．meeting　　　 C．met　　　　 D．meet

19．-_________ he is only 8 years old，he knows more about science than his father．

A．But　　　　　　　　 B．Though　　　 C．So　　　　　 D．Because

18．You can’t go out and play __________ you’ve done your homework．

A．when　　　　　　　 B．since　　　　 C．while　　　　 D．until

17．一Whose exam paper is it?

　　 一It _________ be Li Lei’s．He always forgets to write his name on it．

A．can’t　　　　　　 B．can　　　　　 C．mustn’t　　　 D．must

16．The young man gave his life _______ the little boy，and everyone thought he was a real hero．

A．to saving　　　　　 B．save　　　　 C．saved　　　　 D．saving

15．Sally is leaving tomorrow，and we will go to the airport to _________．

A．see her off　　　 B．see off her　　　 C．pick her up　 D．pick up her

14．The basketball team played well，but they didn’t ________ the competition．

A．score　　　　　 B．beat　　　　　 C．fail　　　　　 D．win

13．We have to get up early tomorrow morning，_________ we will be late for the 6：30 train．

A．and　　　　　 B．or　　　　 　　C．if　　　　　 D．so

从下列各题所给的四个选项中，选择可以填人空白处的最佳选项。

12．Let’s make a cake for Tony．It’s _________ birthday today．

A．her　　　　　 B．hers　　　　　 C．his　　　　　 D．him