问题
.As reported in the essay by Prof. Brown, it is only in the most difficult circumstances ________ a man’s abilities are fully tested.
A:when
B:where
C:that
D:as
B:where
C:that
D:as
正确答案是：
同类题型
I think it’s impossible for _______ people to do _______work in ________a short time．
I was very happy to receive lots of nice presents _____ the morning of Women’s Day. [ ]
The lady in this photo _______ be over fifty! She looks so young!
______are you going to stay there? —______a week. [ ]
our earth, or else it will be no longer fit for us to live on.