41.By buying ten books every month, he soon ____ a good library.
A)accumulated
B)assembled
C)collected
D)acquired
42.Mary doesn't want to work right away because she thinks that if she ____ a job she probably wouldn't be able to see her boy friends very often.
A)has to get
B)had go
C)were to get
D)could have got
43.They are all for your proposal that the seminar ____.
A)be put off
B)was put off
C)should put off
D)is to put off
44.She never laughed, ____ cry.
A)or she ever did
B)nor did she ever
C)or did she ever
D)nor she ever did
45.The United Nations ____ trying to find a better way to bring the two parties together.
A)is
B)are
C)be
D)being
46.You can ____ meat or fish in salt.
A)preserve
B)reserve
C)remain
D)maintain
47.He ____ the newspaper while having his breakfast .
A)observed
B)overlooked
C)scanned
D)glanced
48.____ her sister, Mary is careless and irresponsible.
A)likely
B)unlike
C)dislike
D)alike
49.Although his gestures were elaborate, his face was ____.
A)blank
B)empty
C)vacant
D)hollow
50.It is universally____ that dogs have an acute sense of smell.
A)confessed
B)acknowledged
C)admitted
D)conceded