摘要： I cleaned my classroom . A with three hours B three hours ago C in three hours D three hours before
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I cleaned my classroom ______.
[ ]
A. with three hours
B. three hours ago
C. in three hours
D. three hours before
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B. three hours ago
C. in three hours
D. three hours before
I cleaned my classroom ___________.
[ ]
A. with three hours
B. three hours ago
C. in three hours
D. three hours before
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B. three hours ago
C. in three hours
D. three hours before