【題目】Remember to _____the lights before you leave the lab.

A. turn on B. turn down C. turn up D. turn off

【答案】D

【解析】

句意:在你離開實驗室之前,記住關(guān)掉燈。A. turn on打開;B. turn down調(diào)低;C. turn up調(diào)高;D. turn off關(guān)掉。根據(jù)下文before you leave the lab可知上文是關(guān)掉。根據(jù)題意,故選D。

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