问题
选择题
___________ should not be allowed to go out at night.
A．Twelve-years -old
B．Twelve-year-olds
C．Twelve years old
D．Twelve year olds
答案
答案：B
题目分析：句意：十二岁孩子不允许晚上外出。Twelve-year-olds十二岁的，这里用作名词，复数。注意有连字符时year不能用复数；allow sb to do允许某人做某事，其被动形式是sb be allowed to do; go out出去；at night.在晚上。