题目内容
【题目】Now in order to __________ lungs, you have to start breathing deeply and cough more effectively.
A. expand B. examine
C. explore D. explain
【答案】A
【解析】句意:现在为了使肺扩张,你必须开始深呼吸和用力咳嗽。expand使膨胀,扩张;examine检查,调查;explore探测,探险;explain说明,解释。
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