The best way to prevent the air polluting _____ , but the sky is still not clear.
#102116
A
is used
B
are used
C
has been used
D
have been used
推荐题目
He ________ in American for five years, and now he works in Shanghai.
#102010
A
have worked
B
worked
C
had worked
D
have been working
---You could have asked your brother for help. He is good at math.---Yes. A whole day________ .
#104048
A
will waste
B
had wasted
C
was wasted
D
would be wasted
—The light___________on for long. —Oh, I am sorry , I will go and turn it off.
#101529
A
has been left
B
has left
C
had been left
D
had left
Wait a moment, please. When I _________ writing the letter, I will go shopping with you.
#99366
A
will have finished
B
have finished
C
will finish
D
finished
The famous reporter, who is said to have gone back to America last year, _____in China for almost twenty years.
#101952
A
lived
B
was living
C
has lived
D
had lived