单项选择题

The car___________ speed as it went down the hill.

A．increased
B．won
C．obtained
D．gained
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单项选择题
When the tragic accident happened, the train was going at its ___________ speed.
A．full
B．whole
C．complete
D．entire
单项选择题
Lung cancer has now ___________ breast cancer as a cause of death for women in the U. S.
A．overcome
B．prevailed
C．overtaken
D．conquered
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