在下列各句的空白处填入一个最恰当的单词,使句子意思完整,语法正确。
1. My teacher always encourages us to_______challenges bravely.
2. "You'd better not make the same_______,"said the teacher angrily.
3. I have much_______learning English. Can you help me?
4. At the cnd of the_______students will have an important final exam.
5. It's a_______between you and me, so don't tell others.
6. 1 wonder how to________ with such a difficult problem.
7. Many people________their lives in the earthquake. We felt very sorry about that.
8. - Are we late?
-I'm_______so.
9. Miss Li is very kind to us. She______us as her own children.