问题
选择题
—You see, I’m poor in physics and you are not good at chemistry, and……
— That’s _______ we should help each other.
A. when B where C. how D. what
答案
答案：B
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—You see, I’m poor in physics and you are not good at chemistry, and……
— That’s _______ we should help each other.
A. when B where C. how D. what
答案：B