．
increases
C
．
raises
D
．
heightens
20
．
Those old photographs in my album _____ me of my days at Harvard University years ago.
A
．
remind
B
．
memorize
C
．
remember
D
．
warn
21
．
Those deserted buildings will be pulled down next month to make _____ for a new shopping center.
A
．
land
B
．
room
C
．
area
D
．
place
22
．
Enrolled students must pay a health service _____ of
￥
150 per semester for their medical care.
A
．
sum
B
