--My foot hurts terribly,doctor.--Well,I wonder it has been like this.A.since wh

--My foot hurts terribly,doctor.

--Well,I wonder _______ it has been like this.

A.since when

B.since then

C.how

D.when

试题答案

A

wonder后常接一个由带有疑问意义的连词引起的宾语从句。本题从句的时态用了现在完成时，可推测，需要一个用于现在完成时的时间状语与之搭配。C项how表示方式，应排除；D项when一般不用于完成时；B项then没有疑问意义；A项since when=(sidee what time)可与完成时连用。