单项选择题

After several fruitless attempts, the new approach ______ the tough problem was considered as the last resort.

A．to solve
B．with solving
C．to solving
D．for solving
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单项选择题
He would have to live under their ______ for the next ten years.
A．shade
B．shadow
C．darkness
D．profile
单项选择题
In return for their hospitality, Mr. and Mrs. Brown decided to hold a party to ______ their neighbours.
A．treat
B．entertain
C．serve
D．accommodate
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