单项选择题

Scientists believe that there is not enough oxygen in the Moon's atmosphere to______ plant life.

A．adapt
B．personalize
C．sustain
D．describe
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单项选择题
When you prepare for your speech, be sure to cite______qualified sources of information and examples.
A．unbiased
B．manipulated
C．distorted
D．conveyed
单项选择题
It is apparent that winning the scholarship is______of one's intelligence in the field of physics.
A．parallelism
B．alliteration
C．testimony
D．rhythm
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