单项选择题

The book is ______ as it was the only one ever signed by the President last month in the White House.

A．common
B．unique
C．rare
D．singular
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单项选择题
The young engineer was quite excited when he ______ the experts in this complicated project.
A．insisted
B．assisted
C．resisted
D．persisted
单项选择题
Does Professor O' hare live near the downtown area No, he lives ______.
A．out in the suburbs
B．out in suburb
C．in the out suburbs
D．in suburb
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