单项选择题

By the end of this semester, we surely ______ a satisfactory solution to the problem.

A．have found
B．will find
C．will have found
D．are finding
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单项选择题
We congratulate you ______ the success you have got.
A．by
B．for
C．on
D．with
单项选择题
______ they've moved, we won't see them very often.
A．Now that
B．So that
C．As soon as
D．When
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