单项选择题

English is not the ______ language for almost half of our overseas visitors.

A．native
B．natural
C．original
D．domestic
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单项选择题
Three criminals escaped from prison yesterday afternoon. It was a long time ______ the guards discovered what had happened.
A．since
B．when
C．until
D．before
单项选择题
Susan is not at the meeting. She has been absent ______ our meeting for several times.
A．from
B．of
C．in
D．at
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