Humpback whales live in large groups. They communicate with each other through complex “songs”. Quick Facts

　　Size: 14m—18m in length;

　　30—50 tons in weight

　　Living

　　environment: Open ocean and shallow coastline waters

　　Migration: From warm tropical(热带的)waters, where they breed, to cold polar waters, where they eat

　　Diet: Shellfish, plants and fish of small size

　　Hunting: Sometimes in groups, in which several whales form a circle under the water, blowing bubbles that form a “net” around a school of fish. The fish are then forced up to the surface in a concentrated mass.

　　Current

　　state: Endangered:　it is estimated that there are about 5000—7500 humpback whales worldwide.

　　1. According to Quick Facts, a humpback whale　.　

　　A. cannot survive in waters near the shore

　　B. doesn’t live in the same waters all the time

　　C. lives mainly on underwater plants

　　D. prefers to work alone when hunting food

　　2. To make a breach, a humpback whale must　.　

　　A. use its tail flukes to leap out of the water

　　B. twist its body sideways to jump high

　　C. blow two streams of water

　　D. communicate with a group of humpbacks

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