这道题怎么写！急！

34.Mark and Stephen wanted to find some rare animals.

35.They climbed mountains, crossed rivers and walked through rainforest for looking for the rare animals.

36.They found the biggest parrot in the world, the aye-aye and a manatee.

37.The water in the river got low, some manatees died because they were short of water. And some were killed by other animals and people, too.

38.Because there would not be many of These animals left, Mark and Stephen made a movie about These rare animals.