20、The workers will go on strike if the demands they ________ put forward are turned down.

  A. could       B. would          C. 不填         D. had

19、The moment the 28th Olympic Games ________ open, the whole world cheered.

  A. declared                       B. have been declared

  C. have declared                D. were declared

18、      homework did we have to do that we had no time to take a rest.

  A. So much      B. Too much         C. Too little       D. So little

17、 I' m sure you’d rather she went to school by bus, ________?

  A. hadn't you     B. wouldn’t you      C. aren’t I        D. didn’t’ she

16、 She ________ Japanese when she was in Japan. Now she can speak it freely

  A. picked out   B. made out         C. make up        D. picked up 

15、 If it were not for the fact that she ________ sing, I would invite her to the party.

  A. couldn't      B. shouldn't        C. can't           D. might not

14、 Green products are becoming more and more popular because they are environmentally ________.

  A. friendly       B. various'        C. common        D. changeable

13、--How long do you think it will be _________ China sends a manned spaceship to the moon?

   -- Perhaps two or three years.

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

12、 Ladies and gentlemen, please fasten your seat belts. The plane  ________.

  A. takes off       B. is taking off     C. has taken off   D. took off

11、

Sorry, Madam. You’d better come tomorrow because it’s __________ the visiting hours.

  A. during        B. at              C. beyond       D. before