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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单项选择题
What's the author's attitude towards long-promised home robot
A．Optimistic.
B．Pessimistic.
C．Skeptical.
D．Disbelievin
单项选择题
Which of the following statements is not true
A．Robots will be less expensive than they are now.
B．They will be used as aides for the disabled.
C．They will all be gentle and kind.
D．They will deal with intruders.
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