单项选择题


Questions 19 to 21 are based on the conversation you have just heard.

A．Looking for a person to talk to.
B．Working on a troublemaking talking.
C．Trying to understand the two genders.
D．Trying to understand friendship between women.
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单项选择题
A group of scientists is debating whether there should be limits on research of ______.
A．robots for civil use
B．military computers
C．artificial intelligence
D．biochemical weapons
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