单项选择题

Many a student in my class ______ America.

A．have been to
B．have gone to
C．has been to
D．has gone to
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单项选择题
It was yesterday ______ she saw her boyfriend in the street.
A．when
B．that
C．which
D．as
单项选择题
She is ill, and she has ______ in bed for 3 days already.
A．lied
B．laid
C．lain
D．lay
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