问题
______should not be______to go out at night.
A:Twelve-years-old,allowed;
B:Twelve-year-olds,allowed
C:Twelve-years-old,allow;
D:Twelve-year-olds allow;
B:Twelve-year-olds,allowed
C:Twelve-years-old,allow;
D:Twelve-year-olds allow;
正确答案是：
