问题描述：
please help me a english problem
-----is worth doing well
A whatever is worth doing at all
B that is worth doing at all
C what is worth doing it at all
D whatever is worth doing it at all
-----is worth doing well
A whatever is worth doing at all
B that is worth doing at all
C what is worth doing it at all
D whatever is worth doing it at all
问题解答：
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