单项选择题
Although the hazards of space travel are many, tile rewards made it a worthwhile ______.
A.endeavor
B.execution
C.expenditure
D.expedition
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单项选择题
The committee did their best to ______ the situation, but the damage was already done.
A.certify
B.exemplify
C.justify
D.rectify
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单项选择题
Mike felt that students ______ to these tactics when they see no other way to address the problem.
A.proceed
B.appeal
C.resort
D.incline
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