B.Because nobody can avoid it.
C.Because we have to develop industry.
D.Because a popular onlinepost discussed it.
解析:选B。推理判断题。根据文章第四段内容可知空气面前人人平等不管你的职业是什么都呼吸一样的空气。因此空气一旦被污染谁都没有办法不受影响所以大家都特别关注空气质量。故答案选B。________.解析:选A。代词指代题。they是代词用来代替前面出现的复数名词。根据句意可知此处they代替上文中的human beings。故答案选A。________.veloped in a large scale
C.we can move to Mars after the earth has been destroyed
D.we must protect the environment while developing
economy
解析:选D。推理判断题。文章最后两段强调了我们既要发展经济、科技建设一个强大的国家但同时也要保护生态环境创造一个美好的国度。故答案选D。语法填空:Today________(interview)nineyearold Alex about her feelings on how people can help
2.________(save)the environment.So,Alex,how can we save the environment? ____
W:By saving water.:Well:By not using too much water when we wash dishes________(plant)outside.
M:Oh:When 4.________(drink)something outsideshould keep the garbage until you find a trashcan to put 5.________ in because littering makes our planet dirty.Do you like seeing trash all over the ground?
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