Choice A and B are faulty because the idiomatic form of expression is between X and Y, not between X with Y. Also, in choice B producing…modifies the nearest noun, water vapor, rather than chemical reactions and thereby seems to say that the water vapor alone produced the corrosive acids. Choices C and D are clumsy, and both misuse which: in C which has… illogically modifies water vapor, and in D it is unclear whether which have modifies reactions or sulfur dioxide, nitrogen oxides, and water vapor taken together. E is the best choice for this very difficult question. to produce做定语修饰reactions。因为动词react to do,所以名词形式reactions to do。 |