— Don’t put the waste on the ground, young man. — Oh, I’m sorry. I ______ the dustbin there.
#102678
A
hadn’t seen
B
haven’t seen
C
didn’t see
D
wasn’t seeing
推荐题目
With the help of high technology, many new substances（物质）______in the past years.
#102927
A
discovered
B
have discovered
C
had been discovered
D
have been discovered
His invention ______ of no use by the scientists of that time．
#103132
A
considered being
B
considered to be
C
was considered to be
D
was considered being
How can I ever concentrate if you ________ continually ________ me with silly questions?
#104794
A
have…interrupted
B
had interrupted
C
are…interrupting
D
were…interrupting
---Zhangjiajie is worth visiting. I there with my parents during the holidays.---I agree. I have been there twice.
#99043
A
went
B
have gone
C
have been
D
am going
Scientists think that the continents ____ always where they ___today.
#104180
A
aren't; are
B
aren't; were
C
weren't; are
D
weren't; were