单项选择题

A．make computer users aware of hackingB．train hacking e……

A．make computer users aware of hacking
B．train hacking experts
C．enlighten people on how to prevent computer attacks
D．display the harms of hacking

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单项选择题A．2B．3C．4D．5

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填空题worrying—worry

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填空题person ∧ undergoes—who; undergoes—undergoing