单项选择题

Words 5000 is the only book that（）these words.

A．explain
B．explains
C．to explain
D．have explained

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单项选择题
（）only the 4 members of the committee who attended the meeting last night.

A．That is
B．There were
C．It was
D．There is
单项选择题
He left,（）by anyone.

A．not notice
B．not being noticed
C．being not noticed
D．not noticing
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