单项选择题

Though he views himself as a realist, Cetron says that his findings make him very ______ about future.

A．optimistic
B．sympathetic
C．objective
D．precautious
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单项选择题
No one would have time to read or listen to an account of everything ______ going on in the world.
A．it is
B．as is
C．there is
D．what is
单项选择题
Why does a vegetarian restaurant make its dishes resemble meat in every way except ______
A．ingredients
B．elements
C．components
D．compounds
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