单项选择题

It may be concluded that （）

A．computers have been widely used by Americans
B．computers can solve complex problems
C．computers are domestic robots
D．computers are new machines

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单项选择题
In the author' s opinion, the Eskimo' s attitude toward his dogs is mainly due to （）

A．his marvelous skills
B．his surrounding conditions
C．his living style
D．his tough temper
单项选择题
An Eskimo dog by nature is（）

A．disloyal
B．disobedient
C．mild and gentle
D．fierce and cruel
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