Question

—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

Answer 1

A

句意：很難到河的另一邊�！�—我認為應該在河上建一座橋。結合語境可知下文從句描述是客觀性動作，故用一般現在時態。從句主語是動作對象，故從句中用被動語態。選A。