I don’t know whether you happen ____ it, but I’m going to study in the U.S.A. this September. A. to be heard B. to be hearing C. to hear D. to have heard
The first two services are free,______the third costs£35.
You can’t have this football back _________you promise not to kick at my cat again.
Sarah,hurry up,I’m afraid you don’t have time to__________.
—I am so angry that I could blow my top! —Oh, dear, _______. What’s wrong?
Some scientists believe that it won’t be long _______ robots are widely used in all walks of life.