单项选择题

I didn' t understand at first why he couldn' t pass the test, no matter ______ hard he had tried.

A．when
B．where
C．what
D．how
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Tony is talking about the friends and the food ______ interest him.
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B．who
C．that
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单项选择题
In the ______ half of the 17th century those cities became even more prosperous.
A．latter
B．latest
C．later
D．late
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