单项选择题

Because he could not find the fight theme ______ , his explanation was vague.

A．to center his thoughts about
B．in which to center his thoughts
C．around which his thoughts to center
D．on which to center his thoughts
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单项选择题
John broke the coffee-pot, so his parents have to buy ______.
A．the other one
B．another one
C．other one
D．that one
单项选择题
This box is too heavy, ______ give me a hand
A．would you mind
B．would you please
C．will you like to
D．would you please to
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