—Do you know him?—I’m sure I’ve seen him _____, but I can’t remember the right place.
I _______ go to school on foot, because my home is next to the school. A. always B. seldom C. never
— I have great _______ in learning math and I'm so worried. Could you help me? — Sure. I'd be glad to. A. trouble B. interest C. fun
—Did you see the traffic accident on East Street this morning? — Yes, I _________ shopping with my friend Tina at the time. A. have gone B. am going C. was going
You _______move to the next room. You may still stay here if you like. A. must B. needn’t C. can’t
You will lose the game _________ you try your best. A. when B. if C. unless