单项选择题

He was （）knowing everything about the courses he was to take at the university.

A．lost in
B．attentive to
C．clear of
D．keen on

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单项选择题

He has no alternative but （）to ask his sister for help.

A．to go
B．go
C．going
D．goes

单项选择题

All （）was needed was one final push to close the deal.

A．that
B．what
C．there
D．which

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