问题描述：
he is only too ready to help others ,seldom ,____,refusing them when they turn to him.A if ne...
he is only too ready to help others ,seldom ,____,refusing them when they turn to him.
A if never B if ever C if not D if any
但不理解
he is only too ready to help others ,seldom ,____,refusing them when they turn to him.
A if never B if ever C if not D if any
但不理解
问题解答：
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