A.story | B.advertisement |
C.report | D.diary |
A.The life expectancy had been cut by 5.5 years. |
B.Chinese government should close some factories that pollute heavily. |
C.People need to make pollution less. although it might cost a lot. |
D.The air problem brings us serious problems. |
A.Air pollution in North China is caused by waste gas. |
B.To save the environment. our government should do something more. |
C.The temperature becomes higher and higher in North China. |
D.How air pollution in North China is caused. |