_________ no doubt that a green campus plays an important role in the growth of students, both physically and mentally.

You drive on the right of the road in China. It’s the traffic rule.

My brother _________ works in that factory. He has become a bus driver.

Paul learns English ________. He often goes to the English Corner at weekends.

Who’s your science teacher this term?–Mr. Wang. _______ is a good teacher.