单项选择题

A．He has learned a lot from his own mistakes.
B．He is quite experienced in taming wild dogs.
C．He finds reward more effective than punishment.
D．He thinks it important to master basic training skills.
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单项选择题
It is implied in the passage that the babies at the day-care center ______.
A．were born of mothers with higher IQs
B．were more closely attended to by their mothers
C．were reared under a more favorable environment
D．were given more medical care than those at home
单项选择题
According to the author, ______.
A．the use of clich6s can make a person’s speech very dull
B．a clich6 is used to describe things that are too beautiful for words
C．the phrase "as hard as nails" is no longer in use
D．cliches are .something you can only learn from Shakespearean play
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