单项选择题

What will continue to be ______ it is today--next in importance to oxygen

A．how
B．which
C．what
D．as
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单项选择题
You are very selfish. It's high time you ______ that you are not the most important person in the world, Edgar said to his boss angrily.
A．realize
B．have realized
C．realized
D．should realize
单项选择题
______ to speak when the audience interrupted him.
A．Hardly did he begin
B．No sooner had he begun
C．Not until be begun
D．Scarcely had he begun
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