第Ⅰ卷(選擇題)
Ⅱ.單項(xiàng)填空(共15小題;每小題1分,滿分15分)
21.The possibility________ pleasant smells might reduce pain has been suggested by new research.
A. that B. which C. what D. when
【解析】選A。句意:令人舒服的氣味可以減輕疼痛,這種可能
性已被新的研究揭示。possibility為先行詞,由that引導(dǎo)同位語從
句,對(duì)possibility起解釋說明的作用。