根据句意从方框中所给的单词中选择适当的单词并用所单词的正确形式填空

We spent about an hour ______the room,so we felt very tired.
Sitting at the window,He was watching the _____falling from the trees.
He ____5000yuan for the iphone6 yesterday. It is really expensive.
Every year , there are lots of______from other countries visiting the Great Wall.
In her family, Mary is the ________. She often eats a lot but doesn’t do sports.