BT Arise II - шаблон joomla Продвижение

TOEFL - Reading Comprehension - Test 22

In this section you will find a number of tests based on the fifth part of the Test Of English for International Communication.
For each question you will see an incomplete sentence. Four words or phrases, marked A-D are given beneath each sentence. You are to choose the one word or phrase that best completes the sentence.

Click on the 'View Answers' tab to see the correct answers.

Read the passage and choose the option that best answer each question. 
A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers 5 uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which 10 has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance.