—It'sdifficulttogettotheothersideoftheriver.—Ithinkabri...

问题详情：

—It's difficult to get to the other side of the river.

—I think a bridge ________ over the river.

A. should be built  B. should build  C. will build  D. has built

【回答】

A

知识点：动词语态

题型：选择题