5道英语单选12.The computer of this kind can work ______ than the

5道英语单选
12.The computer of this kind can work ______ than the one of that kind.
A.hundred of times faster B.a hundred time faster C.hundred times faster D.hundreds of times faster
13.About ______ of the workers in that factory are young people.
A.third fifths B.three fifths C.three fives D.three fifth
14.______ of the population here are peasants.
A.20 percents B.20 percent C.The 20 percent D.The 20 percents
15.-- How many students are there in your school,Mike?
-- There are over ______ students in our school.
A.two thousands B.two thousands of C.two thousand D.two thousand of
16.John lives on ______ floor.He doesn't use a lift to go up and down.
A.nine B.the ninth C.ninth D.a ninth