单项选择题

_____ I admit that the problems are difficult, I don' t agree that they can' t be solved.

A．Suppose
B．Because
C．While
D．Until
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If you ______ your children well, you will be proud of them.
A．catch up
B．bring up
C．feed up
D．grow up
单项选择题
They hope to see you again ______.
A．before long
B．long before
C．long ago
D．after long
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