29. A. differently B. different C. differ D. difference
B. Read the passage carefully and choose the best answers (A, B, C or D) from 30 to 34
Dolphins are not fish. They are animals that live in the water. Dolphins are among the most intelligent
animals on Earth. Although they can be found in all oceans in the world, dolphins prefer coastal waters and
bays. The size of dolphins vary greatly. The smallest dolphin is just about 50kg in weight and 1.2 metres in
length while the largest one can weigh up to 8,200kg and is 100 metres long.
Dolphins eat mainly fish. A female dolphin gives birth to one calf every two years after a gestation
period of eleven to twelve months. A dolphin can normally live from twenty-five to sixty-five years and
some species of dolphins can even live longer. Dolphin populations are at risk due to the pollution of their
habitat and accidental entrapment in fishing nets.
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