18．--Do you mind if I smoke?

--____

A．Why not?　　 　　　 B．Yes, help yourself 　 C．Go ahead　　 　　　 D．Yes, but you'd better not

17．--So you missed the meeting．

--____．I got there five minutes before it finished．

A．Not at all　　 　　　　 B．Not exactly　　 　　 C．Not especially　 　　 D．Not really

16．____ from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise．

A．Freed　　 　　　　　　 B．Freeing　　 　　　　　 C．To free　　 　　　　　 D．having freed

15．Young as he is, David has gained ____ rich experience in ____ society．

A．the; the　　 　　　　　 B．a; 不填　　 　　　　　 C．不填；不填　　 　 D．不填；the

14．--When did it begin to snow?

--It started ____ the night．

A．during　　 　　　　　　 B．by　　 　　　　　　　　 C．from　　 　　　　　　　 D．at

13．We had a really bad time about six months ago but now things are ____．

A．looking up　　 　　　 B．coming up　　 　　　 C．making up　　 　　　 D．turning up

12．Now that we ____ all the money, it's no use turning on me and saying it's all my fault．

A．had lost　　 　　　　　 B．lost　　 　　　　　　　　 C．have lost　　 　　　　 D．lose

11．Thank you for sending us ____ fresh vegetables of many kinds．You have done us ____ a great service．

A．不填；a　　 　　　　　 B．the；a　　 　　　　　　 C．不填；不填　　 　 D．the；不填

10．--Your book, Tommy?

--No, Mom, it's my friend's．

--Remember to return it to ____ name is on it．

A．what　　 　　　　　　　 B．which　　 　　　　　　 C．whose　　 　　　　　 D．whosever

9．I ____ to go for a walk, but someone called and I couldn't get away．

A．was planning　　 　 B．planned　　 　　　　　 C．had planned　　 　　 D．would plan