问题
选择题
—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
答案
答案：A
句意：很难到河的另一边。——我认为应该在河上建一座桥。结合语境可知下文从句描述是客观性动作，故用一般现在时态。从句主语是动作对象，故从句中用被动语态。选A。