会议组织实施一般分为（）、（）和会后整理三个部分。
参考答案：会前筹备、会中服务
—_____ your Chinese teacher very old?
—Yes, _____. [ ]
A. Is; he is
B. Are; he's
C. Is; he's
D. Is; he isn't
体能训练分（）个步骤实施。
A.两
B.三
C.四
D.五
