1 One of the most intelligent animals on the planet is the dolphin. 2 These unique animals have been regarded highly by humans for many centuries. 3 In ancient Greece, if sailors saw dolphins swim by their ships when they were starting out ______ a voyage, they believed they would have good luck.

　　4 One unique characteristic that makes them different from other sea animals is the way that they communicate. 5 Dolphins use sound, touch and taste in order to learn about their world; however, unlike dogs, dolphins cannot smell. 6 They use a whistle or sound waves to see and feel their way around their environment. 7 This makes them different from many other sea animals and also helps them communicate _______ people.

　　8 Another unique thing about dolphins is that the bones in their fins are similar ______ those in human arms and hands. 9 However, the connective tissue that surrounds the bones forms a flipper (鳍状肢) instead of a hand with individual fingers. 10 Even though dolphins live in the oceans, they do not drink the salt water around them. 11 Their bodies absorb water from the wide variety of creatures they eat.

　　12 Loving a dolphin is an easy thing to do but, unlike a dog or a cat, the dolphin cannot come home with you from the ocean. 13 That is why many people like collecting dolphin souvenirs. 14 One can find many such things in almost every shop around the world. 15 Even the ancient people painted the images of dolphins on their vases.

　　1. Fill in the blanks with prepositions:____________; _____________; ________________.

　　2. What is paragraph one mainly talking about?_________________________________________

　　_____________ paragraph two:_____________________________________________________

　　paragraph three:______________________________________________. paragraph four:______

　　________________________________________

　　3. Change sentence 2 into active voice:_______________________________________________

　　___________________________________________________________________________

　　4. The special way dolphins communicate with those around them is by ______.

　　A. touching others with their fins

　　B. making special gestures

　　C. smelling the creatures around them

　　D. using whistles and sound waves

　　5. The water dolphins consume mainly comes from ____.

　　A. ocean water B. what they eat

　　C. rain water D. sea plants

　　6. From the passage, we can infer that ______.

　　A. it is rather difficult to train dolphins

　　B. ancient people were fond of dolphins

　　C. dolphins are good pets

　　D. all shops sell dolphin products

　　on with to

　　DBB