单项选择题

The sound of the doorbell startled her and she ______ knocked the ashtray on to the floor.

A．detrimentally
B．spontaneously
C．inadvertently
D．strenuously
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单项选择题
Unable to defeat him by logical discussion, she ______ her old habit of criticizing his speech.
A．fell back on
B．looked down upon
C．lived up to
D．hanged on to
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