问题
It’s a long time________I saw you last.—Yes，and what a pity it is now that it will be a long time________we seeeach other again.
A:before；since
B:since；when
C:since；before
D:when；before
B:since；when
C:since；before
D:when；before
正确答案是：
同类题型
Yournewclothesfityou,butmine____me.
I’ve gained weight these days.-You ________ have eaten so much junk food.[ ]
Tom ________ get up late in the past, but now he ________ getting up early. [ ]
____, sometimes I am very clumsy and drop things or bump into furniture.
. It is not I but you who ___ the first to run to the goal in the competition.