We all know that paper burns in _________ .
Many students in our school _______ the old and they usually offer their seats to them on buses.
I don’t think the newly-directed film by Zhaowei is as interesting as people say, _______?
I can’t play the piano, and _______.
——Helen, do you know if Martin _______ to my party next week?——I think he will come if he ______ free.
Seeing their teacher _______ into the classroom, they stopped _______ at once.