单项选择题

So involved with their computers ______ that leaders at summer computer camps often have to force them to break for sports and games.

A．became the children
B．become the children
C． had the children become
D．do the children become
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单项选择题
Good news was sometimes released prematurely ,with the British recapture of the port _____ half a day before the defenders actually surrendered.
A． to announce
B． announced
C． announcing
D． was announced
单项选择题
Conversation becomes weaker in a society that spends so much time listening and being talked to _____ it has all but lost the will and the skill to speak for itself.
A．as
B．which
C．that
D．what
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