单项选择题

One of the students hasn't prepared ______ lessons very well.

A．his
B．one's
C．ones
D．their
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单项选择题
You'll have to spend ______ whiting your report here.
A．one day or two days
B．one day or two
C．a day or two
D．two days or one
单项选择题
Toward evening, ______ came, which made things even worse.
A．cold raining
B．cold rains
C．the cold rain
D．a cold rain
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