---If I come back in an hour, do you think the manager will see me?---I’m very sorry, but he ________ a meeting then.
When ______ different cultures, we often pay attention only to the differences without noticing the many similarities.
From his ____ voice on the phone, I know everything is going under way.
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.