3. They ________never ___________ the Great Wall.

2. _________you ever ____________America ? No, never.

1. Where’s Jim?　 He ____________ England .

5. You have already finished your work, but I haven’t________.

4. Have you lost your bike____________?

3. I’m full, thank you very much. I’ve ______ had my lunch .

2. Have you ________seen this kind of flower ? No, never .

1. I know a little about England because I have __________been there.

6. I______________(not see) you for a long time.

5. I____________(know) the boy since 1993.