Joe has been studying Chinese for three months．but he can ________ understand people when they speak Chinese．

Please call my secretary to arrange a meeting this afternoon, or ________ it is convenient to you.(2011·江西)

Maybe it is time for the rest of society tothe factI may not be able to walk, there are many other great things I can do.

en we heard the news that our teamhas won more than 30 gold medals Athena Olympic Games, we sang and danced _____joy.

Is there ________in the room—-No， there’s ________there.