单项选择题

The full ______ of changes in computer technology will be felt within the next few years.

A．affect
B．impact
C．action
D．importance
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单项选择题
The coming of automation is ______ to have important social consequences.
A．like
B．frightful
C．bound
D．compelled
单项选择题
Tom could hardly ______ his excitement as he knew that he had made a real discovery.
A．conceal
B．reveal
C．show
D．discover
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