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 ?
......................................................................