According to Dr. David, Americans ________. A) are ideally vigorous even under the pressure of life B) often neglect the consequences of sleep deficit C) do not know how to relax themselves properly D) can get by on 6.5 hours of sleep
【简答题】完形填空。 Mr Black works in a hospital. As a good 1 , the people in the town like him. He's of-ten 2 to the patients and looks them over carefully._ 3 he's always busy and has littletime to rest. One morn...