He is only too ready to help others，seldom，________refusing them when they turn
to him.
A．if neverB．if everC．if notD．if no
B
B　[if ever 為省略用語(yǔ)，意為“如果曾經(jīng)有過的話”。而seldom，if ever 可形成副詞短語(yǔ)，意為“即使有也很少，難得，不�！�。]
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