Unit 5-Modals

Visitors mustn't / don't have to feed the animals in the zoo, as this may harm the animals.

Drivers may/must stop at a red traffic light.

You must not/ don't have to take any photos inside the art gallery. However, there are postcards available of all the paintings.

Nobody can/must borrow these books without permission.

Students must/may bring a small bottle of water into the exam, if they wish.

According to the map, we have to/can walk as far as the river, but not beyond that.