单项选择题

The______ drinking of liquor is much less harmful than habitual use.

A．occasional
B．frequent
C．continual
D．constant

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单项选择题

What is the major characteristic of man's memory capacity according to the author

A．It can be expanded by language,
B．It can remember all the combined words.
C．It may keep all the information in the past.
D．It may change what has been stored in it.

单项选择题

According to the passage, memory is helpful in one's life in the following aspects EXCEPT that______.

A．it involves a change in one's behavior
B．it keeps information for later use
C．it warns people not to do things repeatedly
D．it enables one to remember events that happened in the past

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