31、They use computers to keep the traffic ______ smoothly. 

   A. being run      B. run          C. to run         D. running

30、If you leave the club, you will not be ______ back in. 

   A. received    B. admitted        C. turned         D. moved学

29、What I need is _____ book that contains _____ ABC of oil painting.学科网

   A. a；不填        B. the; 不填      C. the; an        D. a; the学科网

28、Jenny nearly missed the flight ______ doing too much shopping. 

   A. as a result of    B. on top of     C. in front of   D. in need of

27、The CDs are on sale！Buy one and you get ______ completely free.学科网

   A. other        B. others           C. one          D. ones学科网

26、 I’m sure that your letter will get _____ attention. They know you’re waiting for the reply.

   A. continued     B. immediate       C. careful       D. general 

25、She ______ into the thick forest alone on such a dark night

A. dares not go   B. dares not to go    C. dare not to go   D. doesn’t dare to go

24、---Jack left the door unlocked

---It is ______ of him to do foolish things.

A. common            B. ordinary               C. typical                       D. normal

23、Do you know who is the first person _____ the moon?

A. set foot on          B. setting foot on      C. sets foot in                 D. to set foot on