单项选择题

Very few scientists （） completely new answers to the world's problems.

A.come up with
B.come out
C.come round
D.come up to

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单项选择题
The police are suspicious （） his words because he already has a record.

A.to
B.at
C.on
D.of
单项选择题
The girl was （） a shop assistant; she is now a manager in a large department.

A.preliminarily
B.presumably
C.formally
D.formerly
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