9.  I ______ early this morning, so I stayed in bed until 9 o'clock.
A. didn't need to get up
B. needn't have got up
C. need not get up
D. must not get up
      满分：4  分
10.  He got a job so that he could be independent _____ his parents.
A. on
B. in
C. of
D. from
      满分：4  分
11.  The Web also provides an environment in which it is quick and easy to _________ ideas with colleagues.
A. change
B. exchange
C. trade
D. know
      满分：4  分