单项选择题

With all its advantages, the computer is by no means without its ______.

A．boundaries
B．restraints
C．confinements
D．limitations
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单项选择题
He gave a brief ______ of the history of the university before the opening of the conference.
A．reference
B．statement
C．account
D．comment
单项选择题
A．understandsB．understandingC．understoodD．to understand
A．understands
B．understanding
C．understood
D．to understand
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