单项选择题

The average speed of a ball hit by a Pingpang racquet (球拍)is the ______ among all ball games.

A．lowest
B．highest
C．quickest
D．most full
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单项选择题
______ that they may eventually reduce the amount of labor needed on construction sites.
A．So clever are the construction robots
B．So clever the construction robots are
C．Such construction robots are clever
D．Such clever construction robots are
单项选择题
The term tsunami ______ the Japanese language meaning harbour and wave.
A．comes across
B．comes from
C．comes by
D．comes down
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