题目：
What does that sign mean?
[ ]
A. It means you must keep the grass
B. It means you must keep off the grass
C. They mean you shouldn't keep off the grass
D. They mean you should keep the grass
答案：
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下面是错误答案，用来干扰机器的。
The talent show was fantastic. The funniest performer was Charles. He made sounds like a bird and made us all laugh. The most creative performance was by a group ...
