题目内容
—Can you come to help us with our work by 5 o'clock?
—I don't know if I can help; ________.
—I don't know if I can help; ________.
[ ]
A. that's a pity
B. it all depends
C. you are welcome
D. that's a pleasure
B. it all depends
C. you are welcome
D. that's a pleasure
B

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