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John caught a cold on Saturday and ______ in bed ever since.

A．was
B．has been
C．is
D．have been
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科目：初中英語 來源：北京期末題 題型：單選題

John caught a cold on Saturday and ______ in bed ever since.
[     ]
A．was
B．has been
C．is
D．have been

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