完形填空

　　The manager of a small building company was very surprised to get a bill for. two white mice one of his workmen had bought. He 1 for the workman and asked him 2 he had had the bill sent to the company.

　　“ 3 ,” the workman answered, “you 4 the house we were repairing in Newbridge, don't you? One of the things we had to 5 there was to put 6 some new electric wiring. Well, in one place we had to pass some wires 7 a pipe thirty feet long and about an inch 8 , 9 was built into solid stone and had four big bends in it. None of us could think how to do this until I had a good 10 . I went to a shop and 11 two white mice, one of them male and the other female. Then I 12 a thread(线) to the body of the male mouse and put it into the pipe at one end, 13 Bill held the female mouse at the other end and 14 her gently to make her squeak. When the male mouse heard the female mouse's squeaks(吱吱地叫), he 15 along the pipe to help her. I 16 he was a gentleman even though he was 17 a mouse. Anyway, as he ran through this pipe, he pulled the 18 behind him. It was then quite 19 for us to tie one end of the thread to the electric wires and pull them through the pipe.”

　　The manager 20 the bill for the white mice.

1．

[　　]

2．

[　　]

3．

[　　]

4．

[　　]

5．

[　　]

6．

[　　]

7．

[　　]

8．

[　　]

9．

[　　]

10．

[　　]

11．

[　　]

12．

[　　]

13．

[　　]

14．

[　　]

15．

[　　]

16．

[　　]

17．

[　　]

18．

[　　]

19．

[　　]

20．

[　　]