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| they，die，repeat，hour，quick，wash，run，encourage，find，hit，although，human |
The Australian crocodile （鱷魚(yú)） is the largest crocodile in the world．It can grow up to seven meters long and the biggest can weigh up to 1，000 kilos．
What makes crocodiles dangerous is that they attack （攻擊） very（1）
quickly
quickly
．They take animals or people into water and kill（2）
them
them
．They usually attack in the water，but they can suddenly come out of a river and attack animals or people，and they can（3）
run
run
about 17 kilometers in an hour on land．
Every year in Australia there are crocodile attacks on（4）
humans
humans
．Two years ago a 24-year-old German tourist（5）
died
died
when she went for a swim in a lake．（6）
Although
Although
there were signs warning people that there might be crocodiles，the girl and her friends decided to swim in the middle of the night．The girl suddenly disappeared and the next morning her body was（7）
found
found
．Near it was a four-meter crocodile．And only last month two Australian boys watched in fear as their friend was killed by a crocodile．They were（8）
washing
washing
their mountain bikes in a river at that time．Then，those two boys climbed a tree and stayed there for 22（9）
hours
hours
while the crocodile waited below．
But you can survive （幸存） a crocodile attack．Last year a 19-year-old boy was saved from a crocodile when his aunt（10）
hit
hit
it on the nose．Norman's aunt said，"I hit it and I shouted，'Help!'The crocodile suddenly opened its mouth and stopped attacking．"
