Ⅰ. 根据句意及首字母提示完成单词（5分）
1. This is a s ______ question. I don’t know the answer.
2. He n ______ me entering the room.
3. My mother usually w ______ up at 5: 30 a. m. .
4. When did your father b ______ an English teacher?
5. It’s colder than yesterday, so you can see some i ______ on the window.
