﹣Why are the windows so dirty?﹣Because we __________ them for a long time.A. have cleaned B. haven’t cleaned C. didn’t clean
We must hurry up. There are few minutes _______.
They think wolves are dangerous ____ humans, so this leads ____ the danger of wolves.
The boy didn’t go to see the film with his parents yesterday the coming exam.
--- Will it be sunny this afternoon? --- It _______ fine. Who knows? The weather (天气) always changes quickly.
Not only English but also maths _______ my favourite subject.