【題目】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:現(xiàn)在為了使肺擴張，你必須開始深呼吸和用力咳嗽。expand使膨脹，擴張；examine檢查，調(diào)查；explore探測，探險；explain說明，解釋。

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