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 5000~7000 humpback whales worldwide.According to Quick Facts, a humpback whale ______. 　　69. According to Quick Facts, a humpback whale _____. 　　A. cannot survive in waters near the shore B. doesnt live in the same waters all the time 　　C. lives mainly on underwater plants D. prefers t work alone when hunting food 　　70. To make a breach, a humpback whale must _____ 　　A. use its tail flukes to leap out of the water B. twist its body sideways t jump high