We can never expect________bluer sky unless we create________less polluted world.
#8706
A
a; a
B
a; the
C
the; a
D
the; the
推荐题目
According to recent reports, one of the rare animals, _______ crocodile, will be in danger of dying out in _____ 2020s．
#9386
A
a; /
B
the; the
C
the; /
D
/; the
The British commander tried to make Nathan Hale ___, but he failed.
#10335
A
turn a traitor
B
turn the traitor
C
turn traitor
D
turn traitors
She studied ________ medicine before she became ________ writer
#7827
A
the; the
B
the; a
C
不填； a
D
不填； the
I have learned that it’s taking _____ long time to become _____ person you want to be.
#8015
A
the; a
B
a; the
C
the; the
D
不填; a