2 . The performance had intended to please the audience and draw their attention, only ______(greet) with an embarrassed silence, however.  (所给词的适当形式填空)

3 . _________ (improve) the employees’ working efficiency, the supervisor will allow them to have a coffee break. (所给词的适当形式填空)

4 . Tom worked hard, only ________ (fail) again at last. （所给词的适当形式填空）

5 . She decided to go back to college ____________ (advance) her career. (所给词的适当形式填空)

6 . For thousands of years, people have told fables (寓言) ________ (teach) a lesson or to pass on wisdom. (所给词的适当形式填空)

7 . People with disabilities are now doing many things ________（improve）the quality of their lives. （所给词的适当形式填空）

8 . Jack was in low spirits those days and his friends did all they could________ (cheer) him up. （所给词的适当形式填空）

9 . ________ (catch) the early flight, we ordered a taxi in advance and got up very early. (所给词的适当形式填空)

10 . The government has tried every means ____________ (ban) the export of live animals.(所给词的适当形式填空)