Rewrite these sentences: When did you last ride a bike? -> How long is it..?

1. When did you last ride a bike?
-> How long is it
2. The last time I went swimming was when I was in French.
-> I haven't
3. Do you get on with your next door neighbor?
( who)
-> Do you get on with
4. They arrived very late because they had a flat tyre
-> If
5. He didn't hurry, so he missed the bus
->
6. you can't visit the United States unless you get a visa
-> If you
7. Unless some one has a key , we can't get into the house.
-> We can only
8. Susan felt sick, because she ate 4 cream cake
-> If Susan