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

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

单项选择题

If the information give in this passage is correct, when we look at a star at night （）

A．we will notice that it is not moving
B．we cannot tell whether or not it still exists
C．it will be brighter than the moon
D．it is four years that the light we can see will reach us