题目内容
-It's difficult for village children to cross the river to school.
-I think a bridge _________ over the river.
A. should be built B. will build
C. is built D. was built
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题目内容
-It's difficult for village children to cross the river to school.
-I think a bridge _________ over the river.
A. should be built B. will build
C. is built D. was built