27.He hasn’t heard from his friend __________ last month.
问题描述:
27.He hasn’t heard from his friend __________ last month.
对不起啊,还有
A.since B.by the end of C.for D.until
就是AD我选不出
为什么不选D
答
选A. since 自从
注释:“since+过去时间”用于现在完成时(have/has done sth.),符合题意.
不能选D,因为"until+过去时间"用于一般过去时,而不能用于现在完成时.
如:He didn't go to bed until 12:00 last night.