英语时态填空题

英语时态填空题
三、(用括号中动词的正确时态填空.每小题1分,共10分)1.How popular supersonic travel ________ (become) once Concord is in service?2. She ______ (write) five essays before the end of this term.3. With the development of production and science, radio _______ (find) a wide application in a short time.4. This is the place where I ______ (be) born.5. He said Susan ______ (leave) the day before.6. Smith hoped that the boss ______ (give) him an early reply.7. He _______ (work) on this essay since this morning.8. For a long time people believed that the earth ______ (be) flat.9. Another driver had just driven into the back of Jack's car while he ______ (wait) at some traffic lights.10. It's been 35 years since TV ______ (come) to control America