单项选择题

They are sure they have all the facts they need to ______the existence of a black hole.

A．obtain
B．maintain
C．verify
D．display
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单项选择题
It's the company's conviction that its business will be expanded rapidly, though it is at a rather______ level now.
A．modest
B．mild
C．minor
D．minimum
单项选择题
It can be inferred from Berger's suggestions that______.
A．people do not reveal their true self on every occasion
B．in most cases we should avoid contacting the observed person directly
C．the best way to know a person is by making comparisons
D．face-to-face interaction is the best strategy to uncover information about a person
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