三、选词填空。
根据语篇内容，从方框中选择恰当的单词，并用其正确形式填空。每个单词只能用一次。
leg out lost bird save quickly know heavy I If
Long ago, a crocodile (鳄鱼) lived in the river. One day, it crawled (爬) into the desert (沙漠). And it 1 its way. Suddenly, it saw a young man. Then it shouted, "Hi, friend! Please help 2! I couldn't get back to the river."
The young man put the 3 crocodile on his back and took it to the river. Then the crocodile said, "I want to eat you up, but you helped me get 4 of the desert. So I decide to eat only one of your 5."
Then a wise bird came. After 6 about what happened, the bird said to the young man, "I don't think you can carry Mr. Crocodile. 7 you can, please show me now."
So the young man picked the crocodile up again and walked back to the desert 8. Then the 9 turned to the young man and asked, "Young man, do you want to 10 it again?" The man said nothing and just smiled.
1. __________ 2. __________ 3. __________ 4. __________ 5. __________
6. __________ 7. __________ 8. __________ 9. __________ 10. __________

1. lost 2. me 3. heavy 4. out 5. legs 6. knowing 7. If 8. quickly 9. bird 10. save