单选题 When you think of monkeys, you probably think of the tropics. Few species of monkeys venture into temperate lands. Nevertheless, there are one or two notable exceptions.
In the high Atlas Mountains of North Africa, where snowfall is common during the winter, small groups of Barbary apes roam through forests of cedar and oak. One isolated group of these monkeys can be found 200 miles to the north, living on the Rock of Gibraltar, at the southern most tip of Europe. How do naturalists explain this mystery? Some believe that the monkeys colonized other areas of Europe in the distant past and that those of Gibraltar are the only surviving group. Others think that Arabic or British colonizers brought them to the Rock. Legend has it that the monkeys crossed the narrow straits dividing Europe from Africa by means of a long-lost underground tunnel. Whatever their origin, they are now the only free range monkeys found in Europe.
The Barbary apes are not actually apes. They are tailless monkeys. The Barbary apes inhabit the pine woods that cover the upper part of the Rock. Although they number only a hundred or so, they have become"the peninsula’S most famous residents, "according to the International Primate Protection League.
Since seven million tourists visit Gibraltar every year, the mischievous monkeys have an ample food supply. Although they feed on wild plants, they have become sMHed at begging and occasionally stealing food from visitors. Local authorities also provide the monkeys with fruit and vegetables. Apart from feeding, the monkeys spend 20 percent of their day grooming each other. Both male and female monkeys care for and play with the young ones. They live in close knit groups, where stress sometimes leads tO confrontation. While the older monkeys use threats and screams to chase away the younger ones, they also have an unusual tooth-chattering behavior that seems to calm them down.
Their arrival on Gibraltar may remain a mystery；still, these sociable monkeys add a special charm to the limestone headland that guards the entrance to the Mediterranean Sea. Gibraltar would not be the same without them.

单选题 The monkeys on the Rock of Gibraltar are special because______.
A．they live in tropic areas
B．they inhabit temperate lands
C．they live in forests
D．they came from North Africa

单选题 Which of the following is NOT the possible origin of the Gibraltar monkeys?
A．They may be the surviving group of European monkeys.
B．They may have been brought to Gibraltar by colonizers.
C．They may have come from Africa through the long-lost tunnel.
D．They may have swum across the narrow straits from Africa.

单选题 The population of "the peninsula's most famous residents" ______.
A．isgrowing rapidly
B．outnumbers the local people
C．is threatened by too many visitors
D．is about five scores

单选题 We can learn from the 5th paragraph that Gibraltar monkeys ______.
A．mainly feed on food from visitors
B．often threaten local tourists
C．are very naughty
D．are raised by the local authorities

单选题 The word "grooming” in the 6th paragraph is closest in meaning to______.
A．cleaning B．biting
C．fighting D．isolating

单选题 According to the passage, ______.
A．Gibraltar would be better without the monkeys
B．the monkeys have added beauty to the Rock of Gibraltar
C．Gibraltar monkeys and those in the high Atlas Mountains are of different species
D．the older Gibraltar monkeys are very fierce to the younger ones