知识点 4
Use colons to introduce lists or explanations when grammatically valid.
核心知识
Use a colon only after a complete clause and only when what follows explains, illustrates, or lists something promised by that clause.
深入理解
Rule: A colon is not just a dramatic pause. The words before it must already form a complete sentence.
- If the first part is incomplete, the colon is illegal. If the first part is complete and the second part gives the details you were expecting, the colon can work well.
题目
示例解析
Which choice best completes the sentence?
"The committee agreed on three goals _____ lower costs, shorter lines, and clearer signs."
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