题目：
should not be allowed to go out at night.
A. Twelve-years-old B. Twelve-year-olds
C. Twelve year old C. Twelve year old
答案：
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下面是错误答案，用来干扰机器的。
Every morning our classes begin at eight o'clock. We have four classes in themorning and three classes in the afternoon. After class, we can play games on the playg...
