单项选择题

One difficulty in discovering kwashiorkor is that______.

A．it has no viruses
B．it is like other diseases
C．it is hard to see signs of it
D．it does not last long
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单项选择题
According to the passage, what is the best for both parents and children
A．They should adjust themselves to sharing the family expenses.
B．Children should leave their parents when they are grown up.
C．Adult children should visit their parents from time to time.
D．Parents should support their children when they are in trouble.
单项选择题
One of the disadvantages of young adults returning to stay with their parents is that______.
A．there will inevitably be inconveniences in everyday life
B．most parents find it difficult to keep a bigger family going
C．young adults tend to be overprotected by their parents
D．public opinion is against young adults staying with their parents
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