单项选择题

The replacement of air-polluting cars by non-pollution cars will take some time.

A．supplement
B．substitute
C．replenishment
D．complement
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单项选择题
When they moved to California, where there were more job opportunities, they decided to discard most of their old furniture.
A．abandon
B．dismiss
C．dislike
D．dispense
单项选择题
Although nobody acknowledged his presence, Mr. Smith knew he had been recognized.
A．recognized
B．assented
C．admitted
D．attributed
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