Whypleasantsmellsdonotreducepaini

发布时间：2020-07-25 17:37:58

Why pleasant smells do not reduce pain in man is a question still _______ by scientistsA.answeredB.being answeredC.to be answeredD.that answered

网友回答

C解析考查非谓语动词。句意：为什么令人愉快的气味不能降低人的痛苦仍是科学家要回答的问题。根据语境看问题还没被解决所以用不定式的被动式做a question的定语。
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