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  • 科目:英语
  • 题型:选择题
  • 难度:中等
  • 人气:111

There are so many foggy days recently.We all wonder_________.(  )

A.how is the air polluted

B.why the air is seriously polluted

C.what can we do to prevent that bad weather

D.what are the real reasons

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There are so many foggy days r