1. 用所给单词的正确形式填空

1. （1） He refused (do) the housework.
   

3. （2） She (explanation) the reason for being late.

5. （3） The bird in the cage has beautiful (feather).
   

7. （4） We need several different (knife) to make paper cutting.
   

9. （5） I'm very pleased (see) you.
   

11. （6） I am very (frighten) with snakes. Don't let me see them.

13. （7） The plane landed on the (land) site three hours ago.
    

15. （8） There is something (write) on this piece of paper.
    

17. （9） Our teacher asked us not (talk) to each other in class.
    

19. （10） I heard a man (speak) outside the house at that time, but I didn't know who he was.