Humpback whales

Humpback whales   are sometimes called performers of the ocean. This is because they can make   impressive movements when they dive. The name "humpback", which is the common   name for this whale, refers to the typical curve shape the whale's back forms   as it dives.   Sometimes the humpback will dive with a fantastic movement, known as a   breach. During breaching the whale uses its powerful tail flukes to lift   nearly two-thirds of its body out of the water in a giant leap. A breach   might also include a sideways twist with fins stretched out like wings, as   the whale reaches the height of the breach. A   humpback whale breathes air at the surface of the water through two blowholes   which are located near the top of the head. It blows a double stream of water   that can rise up to 4 meters above the water. The   humpback has a small dorsal fin located towards the tail flukes about   two-thirds of the way down its back. Other distinguishing features include   large pectoral fins, which may be up to a third of the body length, and   unique black, and white spots on the underside of the tail flukes. These   markings are like fingerprints: no two are the same.   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 5000~7000 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.

3．	From the passage we can learn that a humpback whale. A． has its unique markings on it tail flukes B． has black and white fingerprints C． gets its name from the way it hunts D． is a great performer due to its songs

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