I often go to school _____ bus.A. on B. in C. by
Liu Yang is the first Chinese woman astronaut ______ has ever traveled in space.
Of the two coats, she’d like to choose the ________ one to save money for a book.
It’s _________ hard problem for the twins that ________ of them can work it out .
______ of that country _______ by snow.
The more books you read, the ______ you will feel.