需要消防保卫勤务的大型活动类型（）
A、党和国家举行的大型政治活动
B、党和国家、举办的重大节日庆典活动
C、植树活动
D、学雷锋活动
参考答案：A, B
____ for a long time is bad for your eyes.[ ]
A. Reading
B. Read
C. Playing football
D. Sleeping
They ______their homework on Sunday . [ ]
A. aren't do
B. don't
C. don't do
D. doesn't do
