---How long do you think it is ______he took up the job?--- Half a year at least.
The new teaching building ______ by the end of last month.
Was it because Jack come late for school ______ Mr Smith got angry?
Most American children go to state schools, but the private schools ______ be very good.
Children should make ______ a rule to wash hands before meals.
— I have never been to the United States before. — ______! Your spoken English is amazing.