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