英语专业专八改错 proo-reading英语专业专八改错 proof-reading英语专业专八改错 proof-reading英语专业专八改错 proof-reading.ppt

Practice 3 proof reading Most people seem to need about eight hours sleep a day, (1) curious and disturbing things begin to happen when (1) (2) the ratio is induced. The fact that sleep is (2) (3) essential to life has known for hundreds of years. (3) (4) A psysiologist for the past century demonstrated that (4) (5) puppies will die if kept awake for more than five (5) (6) days. More recent experiments, carried on people, (6) (7) show that sleep deprivation produces profoundly (7) (8) psychological disturbances including delusions, (8) (9) orientation, and a state of panic or depression. (9) (10) Why do we need sleep? This is easy enough to (10) (11) say that our cells, but, specifically, the cells (11) (12) of our brain, need resting in order to recover (12) (13) from the stress and strains of the waking day, but (13) (14) `rest is a term that remains some basic questions (14) (15) unanswered. Muscle cells are just as much at rest (15) (16) we are lolling in a big armchair watching television (16) (17) as when we are fast asleep in bed, dreaming our true (17) (18) love or the bullying boss at the office. Thinking (18) (19) of the vivid impression you probably detain of a few (19) (20) recent dreams, and you will be fairly satisfied that (20) brain cells can be just as active during sleep as they are when we sit at the office desk. 　　　While more people than ever before are learning foreign languages in public and private institutions