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
The result on Saturday is likely to ______ whether independents and Democrats turn out in numbers for Mr. McCain.
A．tell apart
B．decide on
C．hiuge on
D．map out
单项选择题
The subject matter was so technical as to be beyond the ______ of the average layman.
A. sphere
B, realm
C. ken
D. kingdom
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