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
--- What’s Joan doing?--- ________ newspapers in the room.
#100971
A
She reading
B
She reads
C
To read
D
Reading
------Flight 302 to London_______ until 7:30 tomorrow morning.-----No wonder I hear so many complaints from the passengers.
#104988
A
has been delayed
B
delay
C
delayed
D
will be delayed
—Did you find the missing couple in the mountain yesterday?—No, but we ______ to get in touch with them ever since.
#100903
A
had tried
B
have tried
C
have been trying
D
had been trying
-- She felt so sorry that she burst into tears.-- I’d rather you _____her all about that.
#103566
A
didn’t
B
hadn’t told
C
not tell
D
won’t tell
Don’t call him at this time tomorrow, because he _________ a meeting with his teachers.
#99546
A
is having
B
is going to have
C
will be having
D
has been having