10.
2) Did your mum make...
3) Dad doesn't work...
4) He didn't come...
5) don't visit...
6) Did Julia wear...
7) do
8) I sent
12.
2) Did you go; No, I didn't; I don't work...
3) Did you see; had
4) Does Colin works; doesn't; He works...
5) do you start; started
6) do you do; go
7) Did you do; watched; read