1.—How long do you suppose it is ________ he left for Japan?
—No more than half a month.
A．that B．before C．after D．since
答案 D [此为since引导的时间状语从句。句意：你觉得自从他去日本以来有多长时间了？]
2．________ I can see，there's only one possible way from the danger.
A．As long as B．As far as
C．As soon as D．Even if
答案 B [as far as I can see是固定说法，意为：据我所知。]
