21 . ____ quite recently, most mothers in Britain did not take paid work outside the home.
A. Before
B. From
C. Until
D. Since
22 . I make notes in the back of my diary _________ thing to be mended or replaced.
A. by
B. in
C. with
D. of
23 . In some countries, _____ is called "equality" does not really mean equal rights for all people.
A. which
B. that
C. what
D. one
24 . It is not unusual for workers in that region _____.
A. to be paid more than a month late
B. to be paid later than more a month
C. to pay later than a month more
D. to pay late more than a month
25 . Sir Denis, who is 78, has made it known that much of his collection _________ to the nation.
A. has left
B. is to leave
C. leaves
D. is to be left

21.C
22.C 应该是things复数．
23.C
24.A
25.D