9 . 从方框中选词并用其适当形式完成句子。

asleep       begin       realize       beat       truth

1. Usually we don’t ________ how important nature is to us until it is too late.
2. To tell the ________, I became a college student at the age of 15.
3. He turned down the radio a little because his father was ________.
4. She ________ working as a librarian after she left school.
5. Jordan’s performance inspired（鼓舞）his teammates and they finally ________ the other team to win the match.