单项选择题

During the summer holiday season it is difficult to find a(n) _______room in the hotels here.

A．empty
B．vacant
C．free
D．deserted
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单项选择题
The economic recession has meant that job ______is a rare thing.
A．security
B．safety
C．protection
D．secureness
单项选择题
The poetry of Ezra pound is sometimes difficult to understand because it contains so many ______ references.
A．obscure
B．acute
C．notable
D．objective
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