单项选择题

By giving him electrical shock treatment, the doctor has______ a partial cure of his short sightedness.

A．affected
B．effected
C．afforded
D．rendered
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单项选择题
Before suburbanization which began during the emergence of the industrial city, the city was a small highly compact cluster in which people moved around on foot and goods were ______by horse and cart.
A．conveyed
B．surveyed
C．forwarded
D．delivered
单项选择题
I had been puzzled over the problem for over an hour without any result when all at once the solution______ across my mind.
A．flushed
B．flickered
C．flared
D．flashed
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