问题补充:
Fifteen-year-olds to have jobs in China.
A. is not allowed
B. are allowed
C. is allowed
D. are not allowed
答案:
A. is not allowed
B. are allowed
C. is allowed
(答案→)D. are not allowed
解析:句意:在中国十五岁的青少年不允许参加工作。be allowed (not)to do sth意为“被允许(不)做某事”,故选D。