10.Experts say that feeling(61)sleepy(sleep) around two or three o'clock in the afternoon is quite common and a quick sleep during the day is good for you and that your work will improve(62)asa result.
Researchers from Japan's Centre for Mental Health studied the sleeping(63)habits(habit) of 24 workers.Twelve lucky workers(64)were told(tell) to take a nap in the afternoon and(65)theother twelve had to continue working.The researchers then did some tests on all the workers to find out how efficient they were.The results showed that the people who had been allowed(66)to take(take)a nap scored about 10per cent(67)higher(high) on the tests than those who had not been allowed any sleep at all.The researchers continued with their tests for several hours(68)anddiscovered that the"sleepers"still performed better in the tests(69)done(do) two or three hours later.
So,the next time you feel tired in class and want to take a nap,just(70)explain(explain) to your teacher that you will get much mare done when you wake up.