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which→that
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单项选择题
A．A half hour.B．15 minutes.C．20 minutes.D．An hour and a half.
A．A half hour.
B．15 minutes.
C．20 minutes.
D．An hour and a half.
单项选择题
A．For a few days.B．For several weeks.C．Since last year.D．For a few hours.
A．For a few days.
B．For several weeks.
C．Since last year.
D．For a few hours.
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