Sixteen-year-olds to drive.A. is allowedB. are not allowedC. allowedD. is not allowed

问题补充：

Sixteen-year-olds to drive.

A. is allowed

B. are not allowed

C. allowed

D. is not allowed

答案：

A. is allowed

(答案→)B. are not allowed

C. allowed

D. is not allowed

解析：句意：十六岁的人不允许开车。Sixteen-year-olds应该是复数，be动词用are。结合句意用被动语态，故选B。

考点: 考查动词被动语态的用法。