(4)On the top of the head, toothed whales have a single blow­hole, the baleen whales have two blow­holes, which open only when the whale takes a breath.

　　(5)Whales share five common characteristics with other mammals.

　　①Whales breathe air into lungs.

　　②Whales have hair (although they have a lot less than land mammals, and have almost none as adults)．

　　③Whales are warm­blooded (they maintain a high body temperature)．

　　④Whales give_birth_to their young.

　　⑤Whales feed their young with milk.

Fast Reading 　　1．Read the text quickly and complete the main idea of it.

　　The passage consists of two anecdotes written by Clancy. They are mainly about how Old Tom helped the whalers hunt_the_whale and saved_James_from_being_attacked_by_a_shark.

　　2．Skim the text and put the following sentences into a right order.

　　(1)________　　A．George started beating the water with his oar.

　　(2)________ B．Clancy grabbed his boots and raced after George to the boat.

　　(3)________ C．Clancy arrived at the whaling station.

　　(4)________ D．The killers started racing between our boat and the whale.

　　(5)________ E．Clancy heard a loud noise coming from the bay.

　　(6)________ F．Clancy was sorting out his accommodation.

　　(7)________ G．Clancy ran down to the shore.

　　(8)________ H．The man in the bow of the boat aimed the harpoon at the whale.

　　答案：(1)～(5)　CFEGB　(6)～(8)　ADH

Careful Reading 　　1．Read the text and then choose the best answers.

　　(1)At first, it was ________ that told the whalers there was a whale for them and showed them the way.

　　A．George　　　　　　 B．James

　　C．the writer D．Old Tom

　　(2)Which of the following is TRUE?

　　A．The killers sometimes harmed the whalers.

　　B．Old Tom was 70 years old.

　　C．Old Tom never did favor for the whalers.

　　D．Old Tom and his friends were helpful to the whalers.

　　(3)Why did the killers throw their bodies on the top of the whale's blow­hole?

　　A．To protect the whale.

　　B．To help the whale run away.

　　C．To stop the whale breathing.

　　D．To tell other killers to come closer.

(4)Why did the whalers leave the whale's body behind and return?