—It’s difficult for the village children to cross the river to get to school. We think a bridge_______over the river.
A．was builtB．should be builtC．has been builtD．is being built
B

試題分析：句意：對于村里的孩子過河去上學是困難的。我認為在河上應該建一座橋。橋是動作的承受者，作主語，故用被動結構。含有情態(tài)動詞的被動結構：情態(tài)動詞+ be +done. 故選B。
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