Надо сделать.. завтра сдать read the text below. fill in each gap with one word which best fits each space (1-4). more than a quarter of american teenagers nod off in class 1) least once a week, according to the national sleep foundation. as experts say, the average teen needs about nine and a half hours of sleep but gets only about six or seven. blame an early bell, which at most high schools rings before 8 a. m. that's too early for teen brains, which produce sleep-inducing melatonin later at night, making it hard for them to 2) asleep before 11 p. m. the solution: start school later. high schools in 19 states now start at least an hour later 3) before, opening around 8: 30 a. m. others are discussing it. minneapolis and suburban edina public schools were first in the country to move to later start times; educators say attendance is up and discipline problems — down. «the later students slept on school days, the 4) their results », says the university of california, san diego.

dilyahashimova    2   21.05.2019 15:40    1