题目内容
--- You see, I’m poor in maths while you are not good at English, and …
--- That’s __________ we should help each other.
A. when B. where C. how D. what
B

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题目内容
--- You see, I’m poor in maths while you are not good at English, and …
--- That’s __________ we should help each other.
A. when B. where C. how D. what
B