单项选择题
We usually have a lot of staff illness ______ the winter period.
A.for
B.since
C.over
D.while
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单项选择题
At the end of the night the girls were fast ______.
A.asleep
B.sleeping
C.sleep
D.slept
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单项选择题
He speaks ______ English and German.
A.any
B.either
C.neither
D.both
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