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—How long has Sam been skating?
—He _____ for five hours.

A. have been skating
B. has been skating
C. was skating
D. has been skated
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科目:初中英語 來源:同步題 題型:單選題

—How long has Sam  been skating?
—He _____ for five hours.
[     ]
A. have been skating
B. has been skating
C. was skating
D. has been skated

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