If there are         trees, the air in our city will be         cleaner.
#61428
A
less, more
B
more, more
C
more, much
D
much, more
推荐题目
When spring comes, the days get ____ and the nights get _____. 
#61242
A
long; short
B
short; long
C
shorter; longer
D
longer; shorter
 The harder you study, __________grades you’ll get.
#60669
A
good
B
Better
C
best
D
the better
 –- Why is Tom unhappy today? -- He got______ points of all the boys.
#61033
A
the most
B
more
C
the fewest
D
the least
The actress is already 50, but she looks ______ than she really is.
#61544
A
young
B
more young
C
more younger
D
much younger