单项选择题

To keep a conversation flowing smoothly, it is better for the participants______

A．not to wear dark spectacles
B．not to make any interruptions
C．not to glance away 'from each other
D．not to make unpredictable pauses
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单项选择题
From the third paragraph we know that______
A．Iran has the technology of producing Scud missile
B．some countries could send long-range missile right after they decide to do so
C．Iraq can not become a missile threat to America now
D．both A and C
单项选择题
The author is convinced that the eyes are______
A．of extreme importance in expressing feelings and exchanging ideas
B．something through which one can see a person's inner world
C．of considerable significance in making conversations interesting
D．something the value of which is largely a matter of long debate
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