单项选择题

A．work
B．reduce
C．control
D．change
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单项选择题
A．inventedB．expandedC．modifiedD．developed
A．invented
B．expanded
C．modified
D．developed
单项选择题
Which of the following best summarizes the main information of the passage
A．High-tech helps locate many fascinating archeological sites.
B．Without high-tech, the archeologist's work would come to a stop
C．High-tech is has taken the place of shovels and picks.
D．High-tech makes the archeologist's work more fruitful.
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