1) 2. How long does it take Bob to get to the airport?
3. How long does it take Julia and Mary to get to the marcet?
4. How long does it take your granny to get to the bank?
5. How long does it take you to get to your country house?
6. How long does it take Jim to get to the picture gallery?
7. How long does it take Mark to get to the swimming pool?
8. How long does it take you to get to the railway station?
2) "простираться" - правильный глагол, а "покупать" неправильный, в прошедшем времени имеет форму bought. "Становиться", тоже неправильный глагол, в форме прошедшего времени (past) имеет форму became. Исправь там у себя.