1. We really should arrive at Milan tomorrow morning.
2. You don't need to show your ID to get in anymore.
3. I was told that I shouldn't worry about booking in advance.
4. I really think we ought to say goodbye when we leave.
5. You cannot and shouldn't criticise the hotel staff.
6. You will have to pay any overweight luggage.
7. She is having a difficult time making friends.
8. I think you should stay if you've got a cold.
9. In my opinion, it isn't worth buying an expensive camera.
10. He couldn't reach the top.