. In our class, when the bell rang and the teacher closed his book, it was a ______for everyone to stand up.

   A. mark                        B. chance              C. signal               D. measure

. A notice was ____in order to remind the students of the changed lecture time. 

A. sent up             B. given up   C. set up               D. put up

 People try to avoid public transportation delays by using their own cars and this ______ creates further problems.

A. in short            B. in turn              C. in doubt           D. in case

How much ______she looked without her glasses!

A. Well                       B. good                C. better               D. best

. He was told that it would be at least three more months______ he could recover and return to work.

A. before            B. when               C. since               D. that

. — How about your journey to Mount Emei?

— Everything was wonderful except that our car ______ twice on the way.

A. slowed down                                    B. broke down   

C. got down                                             D. put down

. Experts have warned ______ of the health risks caused by passive smoking.

A. at a time           B. at one time       C. for some time   D. for the time

. Everybody was touched ______words after they heard her moving story.

A. beyond             B. within        C. of                            D .in

Peter’s jacket looked just the same as Jack’s, but it cost ______ his.

A. as much twice as                           B. as twice much as

C. much as twice as                               D. twice as much as

. — Why does the Lake smell terrible?

—Because large quantities of water______. 

A. has polluted                                  B. have been polluted

C. has been polluted                           D. is being polluted