1 . 阅读下列句子，在空白处填入1个适当的单词或括号内单词的适当形式。
1. The mother ___________(upset) to find her daughter hadn’t come back yet.
2. While __________(wait) for the bus, I found a poster on the wall.
3. The student got up so late that she had to go to class __________ breakfast.
4. It is the first time that he __________(climb) a mountain alone.
5. The teacher was angry because the boy broke the glass __________ purpose.
6. He kept regular exercise and his health was improved __________(gradual).
7. Discuss in groups and tell _________ use the people make of the river.
8. They met in an old house_________ roof had been damaged by the storm.
9. Many people think that the British speak the standard English. _________, it is not the fact.
10. Most people prefer traveling to other places to __________(stay) at home.
11. This is the very book ______ has good maps showing details of world geography.
12. The two men talked happily __________ if they were close friends.
13. Many houses ________(destroy) and the people didn’t know where to stay for the night.
14. His friend wrote an e-mail to express her __________(congratulation) on his success.
15. After __________(graduate) from college, they found time to carry out their traveling plan.