The government has taken some measures to reconstruct the earthquake-hit areas, but it must be some time ________ everything returns to normal.

              A. since                        B. after                 C. unless                      D. before

The opening ceremony of Beijing 2008 Olympics is a great success, which is believed  ________ the Chinese splendid civilization.

       A. having been displayed                           B. to have displayed

       C. to be displayed                                      D. displaying

This new teaching approach is specially ______ to develop children’s problem-solving skills.

       A. designed                  B. devoted             C. concentrated             D. hoped

When somewhat better ________ academically, he returned home to continue his research.

       A. equipped                                           B. had equipped

       C. provided                                              D. providing

Darwin counted 225 flowering plants, ________ he collected and brought home 193.

       A. that                         B. in that               C. of which                  D. all of which

Now an increasing number of middle school students go abroad for further study at their own ________, trying hard to realize their dreams.

       A. price                        B. cost                  C. expenses                   D. pay

Could you show me the TV set you’d like ________?

       A. to have repaired        B. repairing it        C. to have it repaired     D. to repair it

To save class time, our teacher has ________ students do half of the exercises in class and complete the other half for our homework.

       A. we                           B. us                     C. our                          D. ours

Leaves are found _______ all kinds of trees, but they differ greatly ________ size and shape.

       A. in; on                      B. in; from            C. on; by                      D. on; in

I know a little bit about the city as I __________ there for one year in my youth.

       A. am studying             B. had studied        C. studied                     D. have studied