1. 结合语境，根据汉语或首字母提示用单词的适当形式填空。

1. （1） He c much time and energy in writing this book.
3. （2） Don't throw waste paper at r or you will be punished to be on duty again.
5. （3） A wide r of colors and patterns are available.
7. （4） This company pays more attention to quality than to q.
9. （5） Your cough is the c of smoking.
   
11. （6） He gave a (一瞥) at his watch and then looked at the sky.
    
13. （7） I (反对) your going there alone because it is not safe.
    
15. （8） We are making slow but (平稳的) progress in our English.
    
17. （9） The event changed the (倾向) of public opinion.
    
19. （10） The new information adds (燃料) to the debate over safety measures.