Choose the correct alternative to fill in each gap in the

Choose the correct alternative to fill in each gap in the sentences.
1. You should / will be able to try to visit Scotland instead of Australia. It will be better.
2. We are going on a package tour, so we needn't / shouldn't make a hotel reservation.
3. In some countries you couldn't / needn't pay to visit public museums.
4. If you want to take photos while you are going round the exhibition, you should / was able to ask a permission.
5. We needn't / wasn't able to spend a long time in the museum if it's not interesting.