问题
选择题
— Excuse me, Maria. May I borrow your pen?
— Sure. Here you are. But you must return it _____ time.[ ]
A.in
B.at
C.on
D.to
答案
答案：C
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— Excuse me, Maria. May I borrow your pen?
— Sure. Here you are. But you must return it _____ time.[ ]
A.in
B.at
C.on
D.to
答案：C