睡莲类同荷花一样都是常用的水生花卉，根据其耐寒性来分属于（）。

A.耐寒类

B.不耐寒类

C.有的耐寒类；有的不耐寒类

D.半耐寒类

-Do you like the country life?

-Yes. In the country there are ____ cars, and there is ________ pollution.[ ]

A. more; fewer  

B. more; more  

C. fewer:less