省略句
在一定的语境里,不至于误解的情况下,说话时往往会省略一些不言自明的成分,这样的句子就叫省略句,可分为对话省略和上下文省略两种情况。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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