Newton was sitting under an apple tree an apple fell onto his head. A. whenB. whileC. aft

发布时间：2020-08-16 22:08:00

Newton was sitting under an apple tree      an apple fell onto his head.
A. when
B. while
C. after
D. before

网友回答

(答案→)A. when
B. while
C. after
D. before
解析：本题考查连词辨析。此处when作并列连词,表示“就在此刻(and justthen)”“,突然(and suddenly)”。
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