单项选择题

He ______ reading silently at first.

A．used not to
B．didn't use to
C．was not used to
D．is not used
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单项选择题
He was living in France when the war ______ .
A．broke off
B．broke into
C．broke out
D．broke through
单项选择题
When Jane fell off the bike, the other children ______ .
A．were not able to help laughter
B．could not help but laugh
C．could not help to laughing
D．could not help to laugh
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