单项选择题

With high hopes, the company sent samples of the substance to scientists, but they couldn't ______ any practical uses for it.

A．come up with
B．do justice to
C．get even with
D．look up to
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The survey asked 750 school children about the values and beliefs they ______ from television.
A．pick up
B．take up
C．put up
D．make up
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I must ______ you farewell right now, but on some future occasion, I hope to see you again.
A．relay
B．bid
C．send
D．deliver
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