Why pleasant smells do not reduce pain in man is a question still _______ by scientists.A.answeredB.

题目简介

Why pleasant smells do not reduce pain in man is a question still _______ by scientists.A.answeredB.

题目详情


Why pleasant smells do not reduce pain in man is a question still _______ by scientists.
A.answeredB.being answeredC.to be answeredD.that answered
题型:单选题难度:偏易来源:不详

答案

C
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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