单项选择题

Lack of imagination is an obstacle ______ one's advancement.

A．to
B．of
C．for
D．about
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单项选择题
Though he is very intelligent, he is ______ rather modest.
A．hence
B．otherwise
C．nevertheless
D．therefore
单项选择题
Can you tell me ______ about the city that makes people love it so much
A．it is what
B．what it is
C．what is it
D．is it what
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