Rewrite these sentences into tag question: Have you just used the computer ?

Rewrite these sentences into tag question

1, Have you just used the computer ?

................................................................

2, Lan often listens to the radio, Doesn't she ?

.........................................................

3. Are there many interesting programs tonight ?

...............................................................

4. Am I late for the party?

...........................................

5. Didn't Ba produce the first TV picture in 1920 ?

...........................................................................

6. Do they never go to the theater ?

.......................................................................

7. Is the pollution the most serious problem ?

...................................................................

8. Do you do gymnastics every morning ?

.......................................................................

9. They do not do he washing up, don't they ?

....................................................................

10. Mary won't come the party, will she ?

......................................................

11. Tim and Bob drove to work last tern, didn't they ?

......................................................................