单项选择题

My sister has been working in that factory ever ______ it was set up.

A．since
B．when
C．while
D．fill
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单项选择题
The lazy student told his parents a lie ______ they had no class that afternoon.
A．what
B．that
C．which
D．why
单项选择题
Jenny is learning Japanese. ______ her brother.
A．So is
B．Nor is
C．So does
D．Nor does
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