He is only too ready to help others, seldom, ______, refusing them when they turn to him.
A．if never B．if ever C．if notD．if anything
B
試題分析：考查if的省略形式。補全空格處則是：if he has ever refused,省掉多余部分可以為if ever。所以選擇B。句意：他總是很樂意幫助別人，如果曾經(jīng)拒絕過那些求助于他的人的話也是很少的。
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