六、语法填空
The biggest shark can 1 (be) nearly 20 metres long. It weighs about 20,000 2 (kilo). A shark is a kind of fish. We always feel 3 (scary) when we see their teeth. Do you know a shark 4 (lose) thousands of teeth in its lifetime? A shark has several rows of teeth and they keep 5 (grow).
When one tooth is lost, 6 tooth behind moves forward (向前移动) within 24 hours. Sharks are very large, 7 they eat very little. A shark eats about 2% of 8 (it) body weight each day. Sharks are 9 (danger) animals. We once saw the news and movies that sharks attacked humans. 10 fact, sharks won't attack humans if they are full. Even so, we'd better not swim near them. Sharks have a very good sense of smell. They can smell a drop of blood in 50 litres(公升)of sea water.
1. 2. 3. 4. 5.
6. 7. 8. 9. 10.
趣味英语
小故事
A little rabbit is picking mushrooms(蘑菇) in a forest. A wolf is coming. He is very hungry. “Oh, a little rabbit! This is my favourite food!”
The rabbit sees the wolf, but she is not afraid. She pretends(假装) to be poisoned(中毒) by the mushrooms. The wolf thinks, “If I eat her, I will be poisoned, too.” So he goes away.
Then the rabbit is very happy. She goes on picking the mushrooms.

1. be
2. kilos
3. scared
4. loses
5. growing
6. another
7. but
8. its
9. dangerous
10. In