摘要： Before white, the door should be cleaned thoroughly. A. painting B. painted C. being painted D. having been painted
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Before_____ white, the door should be cleaned thoroughly.
A. painting B. painted C. being painted D. having been painted
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Before__________white, the door should be cleaned thoroughly.
[ ]
A. painting
B. paint
C. being painted
D. having been painted
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B. paint
C. being painted
D. having been painted