My uncle is a doctor. He sometimes has to work _______ night.
— Pudong Airport, please. I have to be there by 7:00.— ______________, but I'll do my best.
It is difficult for us to learn a lesson in life we’ve in fact had that lesson.
I want to _________ at the meeting, but in the end I _________ nothing.
.She got up to get some sleeping pills but found there was _________ left at home.
—He’s never sung French songs before, has he?—___________. It’s his second time to sing in French.