Choose the best anwser

You shouldn't waste your time to surf the web so frequently
           A            B                          C                        D
There is fewer rainfall in Viet Nam this year than the previous one
           A    B                                                   C               D
He studied very hard,so he passed the exam easy
         A                  B    C                                      D
They had all the carpets cleaned,hadn't they?
             A       B                  c            D
I went to the library to get as many information as i could
            A                                B                           c       D