15、The classroom was so dirty．I decided ________．

A．clean it up          B．to clean it up          C．clean up it

14、Mr. Green asked us to stop ________．So we stopped ________ to him at once．

A．talking；listening             B．to talk；listening          C．talking；to listen

13、There are two libraries in this city，________?

A．aren't there           B．aren't they             C．are two

12、I have been studying for the exams so long．I feel ________．

A．relaxing              B．stressed out          C．comfortable

11、The little boy is very young ________ he can look after himself well．

A．so           B．or         C．but

10、--What color is your mother's scarf?

--It is ________．

A．kind        B．black        C．nice

9、The seats in the middle of the cinema are ________ of all．

A．better          B．good           C．the best

8、--What does your father do?

-- ________．

A．He is a policeman               B．He wants to be a reporter         C．He is reading

7、--What did your teacher say just now?

--Sorry，I don't know．I ________ on the phone，

A．am talking          B．talk         C．was talking

6、--Must I clean the yard now，Mom?

-- ________．

A．No，you mustn't          B．No，you needn't         C．No，you shouldn't