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
(2013·湖南省部分重点中学5月联考)—What are they up to?It’s so noisy.—Some students________a party
Wait, Tom! It is raining so hard. Take a raincoat to ________ yourself from the rain. [ ]
We can give you a ride into town.–_________Thankyou.
I lost my way in complete darkness and ,______ matter worse, it began to rain.