根据提示词造句。
1. 中国已经实行计划生育政策来控制人口。(one-child policy, control)
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2. 我想回收不仅能保护环境,而且能够节省经费。(recycle, not only…but also)
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3. 有几家化工厂正在往河里排放废水。(there be ,pour…into)
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4. 树可以防止泥土流失。(prevent…from,wash…away)
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1. China has carried out the one-child policy to control the population.
2. I think recycling can not only prevent the environment but also save money.
3. There are several factories pouring waste water into the rivers.
4. Trees can prevent the water from washing the earth away.
(答案不唯一)