The field research will take Jone and Paul about five months; it will be a long time ____we meet them again. A. after B before C since D when
25.Why didn’t you tell me there was no meeting today? I all the way here the heavy snow.
24.For quite students, their teacher’s advice is more important than of their parents.
23.He is neither European, nor American. He is from Australia.
22.The music he is playing sounds .
21.--- May I take your order now? --- .