We can never expect ________ bluer sky unless we create ________ less polluted world.(2009·安徽)
#7922
A
a；a
B
a；the
C
the；a
D
the；the
推荐题目
According to a new study by a British’s university , learning ______ second language can lead to ________ increase in your brain power.
#9905
A
a ; the
B
不填；the
C
a ；an
D
the ；an
--How do you pay the waitress? ---As a rule, they are paid ____.
#10329
A
by hour
B
by the hour
C
by an hour
D
by hours
—We had ______ really damp October this year.—I can’t remember ______ autumn when it rained so much.
#8895
A
a; 不填
B
不填; the
C
the; an
D
a; an
Only when you stay with ____ local people for a period of time will you have ____ better understanding of life there.
#9556
A
a; a
B
the; a
C
the; the
D
a; the
As _________ teacher, you must believe that you can make ______ difference to the lives of your students.
#7709
A
a; 不填
B
a; a
C
不填; 不填
D
不填; a