单项选择题

While attempting to find a new route to India, Columbus discovered America by accident.

A．sailing
B．failing
C．trying
D．hoping
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单项选择题
I could recognize the old car at a glance.
A．square
B．feature
C．flame
D．glimpse
单项选择题
She gave up her job to look after her invalid mother.
A．quitted
B．lost
C．paused
D．retired
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