Нужно выбрать правильную форму

Change the forms of the given words to complete the sentences
1 The museum has a remarkable display of (culture)
treasures.
2 A visit to the lost city is a truly (forgettable)
experience.
3 Avoid driving through a dust storm as poor (visible)
makes it difficult to see.
4 They are working on the (preserve)
of the ancient temple.
5 Shelly turned on the air conditioner because the (humid)
was dreadful.
6 The inhabitants of the cave dwellings had (mystery)
disappeared hundreds of years
ago.