（）是阶段性劳动。
A.独立进餐
B.值日生劳动
C.种植
D.折叠衣服
参考答案：C
—Where's his baseball?
—I ________ know. [ ]
A. am not
B. don't
C. isn't
D. aren't
党员咨询服务电话号码是（）
