问题
选择题
—Look! There is a little dog ______ on the second floor.
—Oh, that's mine.[ ]
A. sleeps
B. to sleep
C. sleeping
D. sleep
答案
答案：C
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—Look! There is a little dog ______ on the second floor.
—Oh, that's mine.[ ]
A. sleeps
B. to sleep
C. sleeping
D. sleep
答案：C