B．They have good memories.

C．They have good sight.

D．They are very clever.

Ⅱ.课文阅读填空

About sharks ·Nearly 400 types of sharks.

·About 30 types are reported to have attacked humans.

·Three types of 1. sharks：the great white shark，the tiger shark and the bull shark. Three types of shark attacks ·The shark 2. you for a fish and attacks you，but when it tastes human flesh，it gives up.

·The shark 3. you if it thinks you are fit to be eaten.

·The shark waits for you to swim by，and then attacks you all of a 4. . 5. on how to reduce the risk of a shark attack ·Don't swim in the 6. .

·Don't swim in the ocean if you have a fresh 7. .

·Don't wear bright clothing or jewellery.

·Stay in groups. What to do if a shark attack happens ·Keep calm.Don't get into a 8. .

·Hit the shark on the nose with your fist.

·9. your finger in the shark's eye. 10. of being attacked by a shark You are 30 times more likely to be hit by lightning than be attacked by a shark.

Ⅲ.阅读第二篇课文"The wonderful world of pigeons"，并试着以约30个词概括第五段(P19，Ls11－19)的段落大意。

重点词汇

1．Contrary to what many people might assume，evidence shows that sharks seldom attack