11．Many people think the dinosaurs were the biggest animals that ever lived．They are wrong．The world's biggest animal is still living and it lives in the ocean．It is called the blue whale （鲸鱼）．Blue whales can be as long as 30meters and weigh as much as 1，000kilos．The largest dinosaurs weighed only 500kilos．
The whale is not only the world's biggest animal，it is also one of the smartest．We know that whales can communicate with each other，although we do not know what they are saying．Perhaps one day we will learn how to communicate with whales，and then they will be able to tell us about themselves．
Although they live in the ocean，whales don't lay eggs like fish do．They are mammals （哺乳动物）．They give birth to babies and produce milk inside their own bodies to feed them．Humans are also mammals．
There are lots of stories about whales，but perhaps the most famous story is Moby Dick，which was written by an American writer named Herman Melville．In this book，a sailor named Captain Ahab spends a lot of time trying to find and kill an enormous white whale named Moby Dick．
Sadly，there are not many kinds of whales left．People have killed them for food and other things for thousands of years．However，there are now laws （法律） to stop people killing most kinds of whales．So perhaps there will be more of them in years to come．
51．Which picture shows the correct size of the largest whale？A
52．Whales canC．
A．tell us about themselves
B．lay eggs
C．communicate with each other
D．live on land
53．Moby Dick isA．
A．a story written by Herman Melville
B．a sailor
C．the name of a blue whale
D．a famous dinosaur
54．There are not many kinds of whales left becauseB．
A．they don't lay eggs
B．people have killed them
C．they live in the ocean
D．there are laws against them
55．The passage is mainly aboutA．
A．the world's biggest animal
B．lots of stories about whales
C．laws to stop people killing whales
D．the differences between dinosaurs and whales．
it is，fly kitesIt's a good time to fly kites． 
