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Прочитайте текст. Заполните пропуски в предложениях под номерами В11-В16 соответствующими формами слов, напечатанных заглавными буквами справа от каждого предложения. TEST 16 (part 2) |
Why do we sleep?
B11 | A recent study may have an answer to one of the greatest unsolved mysteries in science — what is the purpose of sleep? The work suggests it’s ...................... about making animals function more efficiently in their environments. | REAL |
B12 | ...................... from the University of California, Los Angeles, conducted a study of the sleep times of a broad range of animals. They discovered much variation. | SCIENCE |
B13 | You may think it ...................... but some migrating birds canfly non-stop for up to 90 hours. | POSSIBLE |
B14 | Pythons and bats are among the longest ...................... at over 18 hours a day. | SLEEP |
B15 | Human babies need 16 hours and their health and intellectual ...................... depend on sleeping properly. | DEVELOP |
B16 | Most of us probably feel we need around eight hours sleep to function well. Some people have ...................... in getting enough sleep and this may lead to serious health problems. | DIFFICULT |