单项选择题

The phrase "impinge on" most probably means ______.

A．promote
B．rely on
C．have an impact on
D．block
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What's the author's attitude towards long-promised home robot
A．Optimistic.
B．Pessimistic.
C．Skeptical.
D．Disbelievin
单项选择题
In the next decade, Robots will become practical because of all but one exception that ______.
A．they may cook hamburgers in the restaurants
B．they can perform wonderous skill as shown in science fiction film
C．they may deliver meal trays in hospitals
D．they may do some moppings in the shopping center
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