He is only too ready to help others,seldom,----,refusing the

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.B.too to除了表示太..而不能...的意思外,还可以表示非常!seldom、if ever "从不,决不"翻译：他非常乐意帮助别人,别人向他求助时他从不拒绝.可是,seldom、if ever 不都是表否定吗?双重否定?纠结了下,