问题
选择题
I don't understand this question. I'd appreciate _____ if you could give me some help.[ ]
A. that
B. it
C. this
D. one
答案
答案：B
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I don't understand this question. I'd appreciate _____ if you could give me some help.[ ]
A. that
B. it
C. this
D. one
答案：B