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.

A、 which
B、 who
C、 that
D、 as
单项选择题
（）coming here, I haven' t seen a single person.

A、 Since
B、 From
C、 By
D、 At
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