单项选择题

We were heartedly arguing about the financial matter, （）the telephone rang unexpectedly.

A. while     
B. as      
C, when   
D. as soon as

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单项选择题
Please accept our ______ for any inconvenience we have caused.
A．apology
B．apologies
C．apologizes
D．apologetic
单项选择题
Wall Street is（）

A．the name of Chinatown in New York
B．the nickname of New York
C．the financial center of America
D．the tourist center of USA
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