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

问题补充：

Sixteen-year-oldsto 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：不许十六岁的孩子们驾车。结合语境可知本句主语为被允许的对象，故用被动语态。主语Sixteen-year-olds为复数形式，故选B。