词语运用。
根据句意及所给提示，补全单词或用单词、固定短语、固定搭配的正确形式填空。
1. Many athletes won gold medals in the Olympics, they are our national h__________.
2. Tom didn't finish _____________( write) his test because he ran out of the time.
3. The girl is making a model doll ___________ (care).
4. The boy felt __________(困倦的) in class because he stayed up late last night.
5. So Terrible! The airplane ______________(起飞) five minutes ago.