________the students came from different countries, they got along quite well in the summer camp.
A. While B. Unless
C. Since D. Until
I believe you will have a wonderful time here you get to know everyone else.
A. though B. as if
C. once D. so that
There is only one more day to go your favorite music group play live.
A. since B. until
C. when D. before
We need to get to the root of the problem______ we can solve it.
A. while B. after
C. before D. as
a single world can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
A. Just as B. Even though
C. Until D. Unless
If you miss this chance, it may be years ____ you get another one.
A. as B. before
C. since D. after