根据句子意思,用所给单词的适当形式填空(答案要告诉我为什么)
I am tired.I want to go to____(asleep).
The girl____(call)Rose comes from England.
It is hard for_____(they) to pass the exam.
Jane is an_____(activity) girl.
When winter comes,some birds go to a_____(warm) place to find food.