单项选择题

There has been a change in the law that will ______ fair treatment for people of all races. "

A．demonstrate
B．derive
C．guarantee
D．prompt
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单项选择题
If you don't tell the truth now, you may have to ______ for it later.
A．inquire
B．answer
C．respond
D．reply
单项选择题
The processor could hardly find ______ data that have been collected for the research project.
A．prospective
B．general
C．plenty
D．sufficient
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