It’s said that an American often starts a speech with a joke, a Japanese seldom does.
A. as
B. when
C. while
D. though
网友回答
A. as
B. when
(答案→)C. while
D. though
解析:连词辨析。As当…时;随着…;when当…时;与一段时间或者时间点连用;while当…时;然而(表转折);though尽管;句意:据说美国人通常以玩笑来开始演讲;然而人比人很少这样。While在状语从句中有多种翻译,当…时;然而;尽管;故C正确。