11. The soil is made ____ the dead leaves of the trees.
A. up of
B. of
C. from
D. by
12. The writer often sat up far into the night working ______ a new novel.
A. for
B. on
C. with
D. in
13. You must stand _____ line when you are waiting _____ a bus.
A. on; in
B. in; for
C. in; on
D. on; for
14. It’s very nice _____ you to get me two tickets _____ the World Cup.
A. for; of
B. of; for
C. to; for
D. of; to
15. We should do something to stop sandstorms _____ happening again and again.
A. from
B. on
C. by
D. to
参考答案：1～5 BDCBA 6～10 DCDAA 11～15 CBBBA
