1.Match the pictures and the proper introductions.

　　(1)________　a mammal which lives in the sea and looks like a large fish with a pointed mouth, related to the whales but generally smaller

　　(2)________　a sea creature with a clear soft body and tentacles (触须；触角) that can sting you

　　(3)________　a sea plant like a garden plant with red, purple, or white flowers

　　(4)________　a large reptile (爬行动物) which has a thick shell covering its body

　　(5)________　a hard substance formed from the skeletons of very small sea animals. It is often used to make jewelry

　　(6)________　a type of small fish which appears to swim in an upright position and whose head looks a little like the head of horse

　　(7)________　a large animal with flippers, which eats fish and lives partly on land and partly in the sea, usually in cold parts of the world

　　(8)________　a very large mammal with the general shape of a fish and one or two blowholes for breathing

　　答案：(1)～(5)　BEGAD　(6)～(8)　CFH

　　2．Fill in the blanks according to the following pictures.

　　(1)Killer whales are one of the top predators (食肉动物) in the sea. As a group, killer whales are known to eat fish, squid, seals, sea lions, penguins, even other whales.

　　(2)Baleen whales have no teeth but instead have baleen plates with which the whales can filter the food out of the water.

　　(3) Orcas are highly social animals that travel in groups called pods. Pods usually consist of 3 to 30 whales, and are led by females. Orca pods often work together to catch a meal.