题目内容
He ______ at work since last Saturday.
[ ]
A. is B. was C. has been D. will be
Was he at work ________?
A．the day before yesterday
B．now
C．next week
D．next sunday
Was he at work __________________?
A．now
B．next week
C．yesterday
D．next Sunday
C．next Sunday
D．yesterday
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