20、____ the temperature might drop, coal was prepared for warming.

A、To consider　　　　　　　　　　　　　　　 B、Considered

C、Considering　　　　　　　　　　　　　　　 D、To be considered

19、--We must thank you for taking the trouble to cook us a meal.

　　 --____.

A、With pleasure　　　　　　　　　　　　　 B、It doesn’t matter

C、It was no trouble at all　　　　　　　 D、By all means

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 ____ great service.

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