用所给动词的适当形式填空 1. He _____(learn) English

问题：

用所给动词的适当形式填空

1. He _____(learn) English for 8 years.

2.I'm so tired, I  ____ ( drive) for eight hours without a rest.

3. You _____ ( do)  the report since six o'clock. Let's have a rest.

4. We ____ ( write)  English for two hours.

5. Your mother ____(look) for you all the morning.

6. Helen  _____    ( leave) her keys in the office,so she had to wait

    until her husband _____( come) home.

7. I ____( hope) to meet Mr. Thompson this morning,but I found nobody left in the room.

8. We plan to reach the North Pole in mid-July,and by then we _____  ( walk)  for six weeks.

9. By the time you arrive in New York,you will ____  ( away) for  two weeks.

10. -Did you find the missing couple in the mountain yesterday?

      -No,but we  ____( try) to get in touch with them ever since.