单项选择题

The city is an important railroad______ and industrial and convention center.

A．conjunction
B．network
C．junction
D．link
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单项选择题
When a number of people______ together in a conversational knot, each individual ex- presses his position in the group by where he stands.
A．accumulate
B．pack
C．squeeze
D．cluster
单项选择题
Research on friendship has demonstrated that______.
A．every student has five or six friends
B．judges are always influenced by a pretty face
C．ugly people find it harder to make friends than beautiful people
D．we lend to grow fond of people if we dislike them at first sight
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