--Mr.Black used to be a worker,_________?--Yes,he_______. Now he is a policeman.
—How often do you drink milk? —I don’t like it,so I _____drink it.
_____ it was very cold, _____ my friend still went swimming in Jialing River this morning.
Jane is high school student in the United States.
Tom studies _______. He _______plays with his friends.
—do you exercise? —Hardly ever.