题目内容
（请给出正确答案）
[主观题]
Speaker A: Could I trouble you to return these two books for me？Speaker B:_____A．It's no t
Speaker A: Could I trouble you to return these two books for me？ Speaker B:_____
A．It's no trouble at all.
B．Yes, please.'
C．Why didn't you go to the library yourself？
D．Sure, I'll be glad to.
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