题目内容
They are not ______ the floor, but ______ it.
[ ]
A. sweep, mop (拖) B. sweeping, mopping
C. sweepping, mopping D. sweeping, moping
答案:B
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题目内容
They are not ______ the floor, but ______ it.
[ ]
A. sweep, mop (拖) B. sweeping, mopping
C. sweepping, mopping D. sweeping, moping