并说明理由

并说明理由
1.This room is ___ that one.
A.three times as larger as B.three times the size of
C.three times large D.three time as large as
2.The lost of machine was reduced by ____.
A.20 percent B.20th percent
C.percent 20 D.percent th20
3.Are there enough books for ____?
A.three us B.us three
C.all us D.the three us
4.About ____ of the teachers in their school are women.
A.two-three B.two threes
C.two-thirds D.second-third
5.They arrived at the place by ____.
A.two and three B.three and two
C.twos and threes D.threes and twos