When is the best time ______ China?
–_________ is your home from your school? –It is only fifteen minutes by bike.
–Would you mind _________ your voice down? We are doing our homework. –Sorry for that.
–I always make mistakes in my math exams. What should I do? –I think you should be _________.
My car went ______ fast and narrowly missed _______ another car.
--What did the teacher say just now? --- The teacher told us _______ our hands before ______ the questions.