单项选择题

A group of angry parents had __________ outside the head teacher's office.

A．assembled
B．accumulated
C．piled
D．joined
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单项选择题
The prospect of increased prices has already __________ worries.
A．provoked
B．irritated
C．inspired
D．hoisted
单项选择题
The vocabulary of any technical discussion may include words which are never used outside the subject or field __________.
A．in view
B．in case
C．in question
D．in effect
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