I think there will be pollution and cars in the future.A. fewer; manyB. more; lessC. less

问题补充：

I think there will be pollution and cars in the future.

A. fewer; many

B. more; less

C. less; fewer

D. less, much

答案：

A. fewer; many

B. more; less

(答案→)C. less; fewer

D. less, much

解析：few和little都表示否定含义，意思是很少，区别是前者修饰可数名词复数，后者修饰不可数名词；many和much都表示很多，区别是前者修饰可数名词复数，后者修饰不可数名词，他们的比较级都是more。句意：我认为在将来污染会更少，汽车也会 更少。Little的比较级是less，结合语境可知选C。