ution are well known to everyone --- polluted air, polluted water and polluted earth. though a great deal is already being done to control these effects, the problem of pollution is still serious. continued population increase, smog and chemical waste produced by factories and cars, not only threatens to exhaust our resources, but also pollutes our environment. we do need clean air, safe water and our children’s health.

　　in my opinion, to solve the problem of pollution, everyone must refrain from polluting our environment. we should know that this is the duty of every individual, not that the government alone.

　　22.

　　   last week, we did research into how laid-off workers get their new jobs. we had a discussion in three groups and then began our research separately.

　　   group one surfed on the internet and learned that most of the laid-off workers had already got their new jobs. in the vocational training center, the students in group two

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