问题
选择题
— You see, I'm poor in maths, you are not good at English.
— That's ________ we should help each other. [ ]
A. when
B. where
C. how
D. which
答案
答案：B
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— You see, I'm poor in maths, you are not good at English.
— That's ________ we should help each other. [ ]
A. when
B. where
C. how
D. which
答案：B