It is a great gift for him and the whole family ___,
Because of ______ high demand for Type AB blood, ______ supplies of it are usually limited.
We have every reason to believe that _______2010 World Expo in Shanghai will be _______ success.
----Have you known Professor Jackson in our department for a long time ? ----Yes, since he _____ the our university.
--- Something wrong with my headache . --- No wonder. You ___________ on the program for such a long time.
_______ two exams to worry about, I have to work really hard this weekend.