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Trees take in harmful gases from the air ang produce oxygen

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Trees take in harmful gases from the air ang produce oxygen for us to breathe Trees_____ turn
harmful gases from the air ______ oxygen for us to breathe.英语学案上的题
Trees take in harmful gases from the air ang produce oxygen
填into.
再问： 有两个地方需要填
再答： 那就在turn前填上can： Trees can turn harmful gases from the air into oxygen for us to breathe. 树木能把空气中的废气变成氧气供我们呼吸。
Trees take in harmful gases from the air ang produce oxygen 英语选择题Trees _____harmful gases from the air and ____oxygen.Ye Trees produce oxygen,为什么不是Trees provide oxygen 英语翻译Cars produced gases almost as harmful as the gases from We ____ in oxygen in the air The trees produce a chemical to protect themselves from inse （ ）4.We must _____the factories from producing harmful gases The ___ of oxygen in the air rises, and at last the air beco 60% of air pollution is from waste gases of vehicles and in why are trees important (参考词语,take in carbon dioxide,oxygen, The harmful gas from the factories pollutes th air.The harmf 这句话对吗?Greenhouse gases keep heat in the air and make the ear