I. 选择填空 从各题的四个选项中选出一个最佳答案 (共15分，每小题1分)。
（ ）1. The boy makes a living _________newspapers.
A. sell B. in selling C. by selling D. on sell
（ ）2. --- It’s difficult for the village children to cross the river for school.
--- I think a bridge ________ over the river.
A. should be built B. is being built C. has been built D. was built
( ) 3. Amy used to be very short, _______ she?
A. used B. didn’t C. didn’t use D. usedn’t to
（ ）4. Jane ___ sing us an American song last Saturday.
A.heard B. was heard to C. hear D. was heard
