单项选择题

Questions 11 to 18 are bused on the conversation you have just heard.

A．He is a policeman.
B．He is a school runner.
C．He is a librarian.
D．He is a teacher.
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单项选择题
The power of videoconferencing lies in that it can ______.
A．enhance the communication
B．increase productivity
C．understand the real meaning of the other party
D．all of the above
单项选择题
We learned from the passage that ______.
A．even in 2030, obstacles still exist in reading and interpreting human thought
B．nowadays people feel angry with the domination of the history by elites
C．by the year 2050, human beings can lead an everlasting life biologically
D．people can only "live in" silicon to get an immortal life
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