单项选择题

A．The trees are what make the campus beautiful.
B．The trees help cool down the air.
C．She doesn’’t need to turn on her air conditioner anymore.
D．She would like the air conditioner on.
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单项选择题
The integrity of the leadership of the organization is the best method for promoting a trusting work environment.
A．Y
B．N
C．NG
单项选择题
The examples of the Challenger and Chernobyl cited by the author serve to show that______.
A．if not given close examination, technology could be used to destroy our world
B．technology is a human creation, so we are responsible for it
C．technology usually goes wrong, if not controlled by man
D．being a human creation, technology is liable to error
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