Reading and vocabulary. Black Rhinoceros

Black rhinoceroses have a sort of attack-first-and-ask-questions-later attitude. When a rhino catches the scent of a human or anything else unfamiliar, it is likely to charge. Rhinos can't see well, so they sometimes charge objects like trees and rocks, mistaking them as threats. But rhinos have keen senses of smell and hearing.

Rhinos sometimes fight with each other. Black rhinos use the bigger of the two       on their noses as weapons in a fight.

Their horns, made of a substance similar to that of human             , sometimes break off, but they regenerate, or grow back. Female rhinos also use their horns to protect their        from           such as lions, crocodiles, and hyenas.

In spite of their fierce            , black rhinos do have a softer side. The females are very attentive         . They look after their young for years, protecting them from enemies and          them how to survive independently. Young rhinos usually stay with their mothers until a         is born. By then they're generally over two years old, almost adult size, and ready to live on their own.

Humans are     [the, an] only real threat to adult black rhinos. In several Asian cultures, people believe      [than, that] a rhino horn provides powerful medicine for a variety     [of, off] ailments. Other people, who live mainly in northern Africa, use rhino horns         [making, to make] the handles for special daggers. Since rhino horns fetch high prices,      [much, many] poachers are willing to break the law and kill       [this, these] endangered animals.

There are five different species of rhinoceros: black, white, Javan, great Indian, and Sumatran.