【題目】If you leave the water running ________ you are brushing your teeth, you might waste a lot of water.

A.butB.whileC.duringD.and

【答案】B

【解析】

句意:如果你刷牙時(shí)一直讓水流淌著,你可能會(huì)浪費(fèi)掉很多水。

本題考查連詞。but但是,while當(dāng)……時(shí)候,during……期間,是介詞;and而且,根據(jù)you are brushing your teeth此處表示當(dāng)你正在刷牙時(shí),與現(xiàn)在進(jìn)行時(shí)連用,用while引導(dǎo)時(shí)間狀語(yǔ)從句。故選B

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