【单选题】

"Daydreaming again, barb You’ll never (21) anything if you spend you time that way!Can’t you find something useful to do "

Many youngsters have heard words (22) from their parents.And until recently this hostile attitude towards daydreaming was the most common one.Daydreaming was viewed as a waste of time. Or it was considered an unhealthy escape from real life and (23) duties.But now some people are taking a fresh look at daydreaming. Some think it may be a very healthy thing to do.
Attitudes towards daydreaming are changing (24) attitudes towards night dreaming have changeD、Once it was thought that nighttime dreams (25) our (26) rest.But then researchers tried (27) the dreams of sleepers. They learned that sleepers who are allowed to dream lose the benefits of rest. They have trouble concentrating. Their mental health is (28) damageD、
(29) again, they must be allowed to dream.
Now researchers are finding that daydreaming may also be important to mental health.Daydreaming, they tell us, is a good means of relaxation.But its benefits go (30) A、number of psychologists have conducted experiments and have reached some surprising conclusions.
Dr. Joan T. Freyberg has concluded that daydreaming (31) intellectual growth. It also improves concentration, attention span, and the (32) to get along with others, she says. In an experiment (33) schoolchildren, this same researcher found that daydreaming led the children to pay more attention to detail. They had (34) feelings. They worked together better.Another researcher reported that daydreaming seemed to produce improved self-control and creative abilities.
But that’s only part of the story. The most remarkable thing about daydreaming may be its (35) in shaping our future lives as we want (36) . Industrialist Henry J. Kaiser believed that much of his success was (37) the positive use of daydreaming. He (38) that "you can imagine your future." Florence dreamed of becoming a nurse. (39) pictured himself as an inventor. For these notable achievers, it appears that their daydreams came true.
Dr. HarryEmerson Fosdick believed that the way we picture ourselves is often the way we turn out. He offered this advice, "... Picture yourself vividly as defeated, (40) alone will make victory impossible ...\
A．maintained
B．retained
C．contained
D．obtained