单项选择题

______many times, he still doesn't know how to use the computer.

A．He has been told
B．We have told him
C．Having been told
D．Having told him
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单项选择题
He devoted all his life to______for human rights.
A．fight
B．fighting
C．fought
D．be fought
单项选择题
Helen had to shout above the sound of the music______.
A．making herself hear
B．to make herself hear
C．making herself heard
D．to make herself heard
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