I have been skating nine o′clock.——青夏教育精英家教网——

摘要：I have been skating nine o′clock.

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I have been skating _______ nine o’clock.

A. for B. since C. at D. from

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I have been skating _______ nine o’clock.

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I have been skating _____ nine o'clock.

[ ]

A. for
B. since
C. at
D. from

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I have been skating _______ nine o’clock.

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>【题文】I have been skating _______ nine o’clock.

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