．We can never expect _________ bluer sky unless we create _________ less polluted world.
#7748
A
a；a
B
a；the
C
the；a
D
the；the
推荐题目
—Did you have _____ fun in Australia?—Sure. It was _____ unforgettable experience.
#9324
A
a; an
B
/; the
C
the; an
D
/; an
India attained________independence in 1947，after________long struggle.(2013·新课标全国Ⅰ，31)
#7778
A
/；a
B
the；a
C
an；/
D
an；the
It was ________ surprise that my first teacher, already 90, was still living and in ______good health.
#8213
A
the; a
B
/; a
C
a; /
D
a; the
I want an assistant with _______ little knowledge of French and _______experience of office routine.
#8800
A
the; a
B
the; an
C
a; 不填
D
a; an
He is neither______ European, nor______ American. He is from______ Australia.
#10414
A
a; a; /
B
a; an; the
C
a; an; /
D
an; an; /