单项选择题

It was while she was reading a book in her study ______ a thief broke into the house.

A．when
B．that
C．so
D．what
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单项选择题
They have equipped the office with the______ business machines.
A．last
B．latter
C．latest
D．later
单项选择题
A dark suit is preferable______ a light one for evening wear.
A．for
B．than
C．of
D．to
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