How to protect the environment？
Mike	☆ Never spit in public or（1） on public walls. ☆ Plant trees in the field in spring. ☆ Collect 50 kilograms of waste paper and（2） bottles.
The factory	（3）
Boys and girls	Join Mike.

（1）A.put up advertisements	B.draw pictures	C.throw rubbish
（2）A.500	B.1，500	C.2，000
（3）A.Break the rule of the law	B.Plant more trees	C.Stop pouring dirty water into the South Lake