单项选择题

We see distant galaxies as they were long ,long ago because

A．they were closer together then.
B．the universe has always looked as the same.
C．their light takes so long to reach us.
D．they have travelled such a long way.

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单项选择题

What is the basic difference between the two classes of theories

A．It concerns the place and time of the formation of matter.
B．It is whether the universe will continue to expand or not.
C．It is the current state of the universe.
D．The variations on evolutionary theories cause the difference

单项选择题

Which can be the best title for the passage

A．The Launching of WTO.
B．The Influence on WTO.
C．The Superiority of WTO over GATT.
D．The Influence Caused by WTO.