完形填空

Arriving at the slopes(山坡) on a cold February morning, I filled my mouth and nose with mountain air. I stepped 1 a foot of white snow from the car. But soon my new shoes 2 as heavy as iron. My son and my daughter happily joined the lines 3 at the chair lifts. The skiers arrived and they were all 4 , from little children to grandparents.

At ten o'clock, the bell 5 and the morning lessons began. As I got 6 ready, my heart 7 faster and faster. What would I do 8 I broke a leg or an arm?

Our 9 , a woman in her early 20's, looked us over carefully. “ 10 we'll learn the snowplow(滑行),” she said. “After that, you'll feel 11 of yourself.” She 12 us a beautiful V with the front ends of her skis(滑雪板) together and moved 13 on the snow.

The first time I got my skis crossed and 14 a quick sit-down. 15 second time I got my skis split and lay down on my 16 . Going up the slopes was even 17 . Several times I fell out of the 18 because they were made too small for me. But the children 19 do the same as the teacher 20 after trying a few times.

1．

[　　]

2．

[　　]

3．

[　　]

4．

[　　]

5．

[　　]

6．

[　　]

7．

[　　]

8．

[　　]

9．

[　　]

10．

[　　]

11．

[　　]

12．

[　　]

13．

[　　]

14．

[　　]

15．

[　　]

16．

[　　]

17．

[　　]

18．

[　　]

19．

[　　]

20．

[　　]