甲比乙少20%，则甲与乙的比是（ ）
A．1：5
B．1：4
C．4：5
D．5：4
甲与乙的比为：
（1-20%）：1=80%：1=4：5．
故选：C．
It isn’t clear_____ is to blame.We need to find a solution to the problem first.
A．who is it that
B．who it is that
C．it is who that
D．that who it is
What can we infer from this statement().
A.Lisa is often late for meetings.
B.Lisa’s flight was delayed.
C.Lisa often attends business meetings.
