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
We were told that we could not swim until ______ came in because the sea was too far out.
A．Water
B．current
C．flood
D．tide
单项选择题
______ the advances of scientific forecasting, in spite of the thousands of daily bulletins and advisories that get flashed about, the weather is still ultimately capricious and unpredictable.
A．For all
B．But for
C．As for
D．As to
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