grammar question, thanks a lot for your help!!!!

iamdurant · 发表于 2011-5-23 14:06:21

Acid rain and snow result from the chemical reactions between industrial emissions of sulfur dioxide and nitrogen oxides with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.

A.with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.

B.with atmospheric water vapor producing highly corrosive sulfuric and nitric acids.

C.andatmospheric water vapor which has produced highly corrosive sulfuric and nitric acids.

D.and atmospheric water vapor which have produced highly corrosive sulfuric and nitric acids.

E.andatmospheric water vapor to produce highly corrosive sulfuric and nitric acids.

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grammar question, thanks a lot for your help!!!!

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