Teenagers should drive. They’re not serious enough.A. allowed toB. be allowed toC. allow t

问题补充：

Teenagers should drive. They’re not serious enough.

A. allowed to

B. be allowed to

C. allow to

D. not be allowed to

答案：

A. allowed to

B. be allowed to

C. allow to

(答案→)D. not be allowed to

解析：句意：不应该允许年轻人驾车。他们还不够严谨。本句中主语是动作的对象，故用被动语态。选D。