单项选择题

Malaria, it is true, has been practically ______ in thirteen countries, including the United States, and is under attack in many others.

A. wiped out
B. died out
C. put out
D. kept out
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单项选择题
He was driving very fast because he was ______ of the fact that there was a speed limit.
A. innocent
B. aware
C. ignorant
D. sure
单项选择题
______ tomorrow, he would get there by Wednesday.
A. Would he leave B. If he leaves
C. Was he leaving
D. Were he to leave
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