﹣Why are the windows so dirty?
﹣Because we __________ them for a long time.
A．have cleaned
B．haven’t cleaned
C．didn’t clean
It was a bit noisy. So the library assistant went to tell them __________ to each other again.
A．don’t speak B．to speak C．not to speak
﹣What’s your plan for this year?
﹣Last year we went to Paris, but this year we want to do __________ different.
A．something B．anything C．nothing
I have __________ my watch everywhere. But I cannot find it.
A．looked at B．looked up C．looked for
﹣Do you think we’ll need a coffee pot?
﹣I don’t drink coffee, and __________. It’s not necessary. Why not a tea service?
A．so do you
B．neither do you
C．so are you
New technology __________ to stop the students from cheating in the exam last year.
A．used B．is used C．was used
