Give the correct form of the word given to complete the sentences

Give the correct form of the word given to complete the sentences.
13.When they went camping in the forest, they brought_____bags to avoid dangerous insects. (SLEEP)
15. Hue is one of the tourist______in Viet Nam. I'd like to visit the Perfume River and many ancient tombs there. (ATTRACT)
18. This is the ______ pagoda in our country. (OLD).
19. Do you know what the ______ of the river ? . (DEEP)
20.This tree has a lot of green_______ (LEAF)