—Idon'tthinksixteen­year­olds

问题详情：

—I don't think sixteen­year­olds ________ to drive.

—I agree. They aren't serious enough at that age.

A．can allow          B．need be allowed

C．should allow        D．should be allowed

【回答】

D　点拨：本题用语法判定法解题。根据句意可知应该用被动语态。故选D。

知识点：动词语态

题型：选择题