单项选择题

We can know from the information given in the passage that the moon must be about ______.

A．300,000
B．two million
C．400,000
D．480 times 300,000
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单项选择题
In the first sentence, about it similar in meaning to ______.
A．around
B．only
C．at least
D．nearly
单项选择题
Sunlight seems to ______ than the light of the moon.
A．have to travel a greater distance
B．move less quickly
C．travel much quickly
D．be less powerfull
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