摘要： It means `Danger’. ? 三 改错
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选择
A: __1___. They mean different things.
B: There is a sign on the grass. What does it mean?
A: It means "__2__".
B: There is a bike on that sign. What does it mean?
A: It means "__3___".
B: There is a sign beside the tree. A man is climbing in the sign. What does it mean?
A: It means "___4__".
B: Thanks a lot. __5___.
A. No climbing
B. I know a lot about the signs now
C. No cycling
D. Keep off the grass
E. There are a lot of public signs here
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