题目内容：

首字母填空，请根据句意和首字母提示，写出单词的正确形式（每小题1分，共8分）

1.They looked disappointed, for they were d_________ in the football match.

2.The writer was so a_________in his writing that he forgot to flick the ashes from his cigar.

3.To my d_______, the teacher announced that I ranked first in the mid-term examination.

4.Unlike his pessimistic friends, he is o____________ about the future and believes everything will get better and better.

5.The United Kingdom c__________ of four countries, that is, England, Scotland, Wales and Northern Ireland.

6.We can forecast what the weather will be like tomorrow, but it’s impossible to p________ what will happen to our life in the future.

7.Effective measures must be taken to prevent the river from being p______________.

8.English speakers also enjoy other forms of Asian poetry---Tang poems from China in p_____.