—I think everyone must do his best to _______pollution.—If so, there will be a good future for people of tomorrow.A. keep B. stop C. stand
If I can run as _____as Tom, both of us will be chosen to take part in the sports meeting.
He ________his English book at home yesterday.
Mike went boating with his friends last weekend. They ______ a good time.
Can you practise the violin with me after school?
--- ________ do you get to school? --- I go there by bus.