单项选择题

The phrase "once in a blue moon" in last line refers to ______.

A．all at once
B．once for a long time
C．once in a while
D．once and for all
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单项选择题
How much money do single women and their children get from welfare programs every year
A．40 to 80 billion dollars.
B．16 to 40 billion dollars.
C．32 to 40 billion dollars.
D．16 to 32 billion dollars.
单项选择题
What will probably happen to most illegitimate children
A．They will be kept by their fathers.
B．They will be kept by their grandparents.
C．They will be kept by their mothers.
D．They will be adopted by someone else.
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