They have seen many interesting things ______ they started their trip last month.

admin2009-03-21  36

问题 They have seen many interesting things ______ they started their trip last month.

选项 A、since
B、before
C、until

答案A

解析 句意:自上个月开始旅行以来,他们看到过许多趣事。本题考查连同的用法。before引起的时间状语多用于一般过去时中;until要和not连用,构成not...until句型,所以B、C应排除。故A项正确:在现在完成时中表示时间的两个标志性连词是 since和for,since后面接表示一个时间点的时间状语,for后接表示一段时间的时间状语。
转载请注明原文地址:https://kaotiyun.com/show/k2Md777K
0

最新回复(0)