单项选择题

You'd better______how to repair computer.

A．to learn
B．learning
C．learn
D．learnt
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单项选择题
He has invited me to the party,______is very kind of him.
A．that
B．which
C．what
D．it
单项选择题
Generally speaking, instant noodles are______in grocery stores.
A．probable
B．available
C．enjoyable
D．approachable
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