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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单项选择题
There was a quick turnover of staff in the department as the manager treated his employees with ______ contempt.
A．utter
B．sole
C．intimate
D．corresponding
单项选择题
Furthermore, if I were to leave him, he would ______, for he cannot endure to be separated from me for more than one hour.
A．prevail
B．preside
C．perish
D．persecute
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