问题描述：
five meter,five meters,five meters' 选择哪个?
The hole is____ deep.It is dangerous.We should put a sign.
five meter five meters five meters'
三个答案应该选哪个?
为什么?
The hole is____ deep.It is dangerous.We should put a sign.
five meter five meters five meters'
三个答案应该选哪个?
为什么?
问题解答：
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