He is ready to help others seldom refusing them when they turn to him.A. if never B. if

问题补充：

He is ready to help others ,seldom, refusing them when they turn to him.

A. if never

B. if ever

C. if not

D. if any

答案：

A. if never

B. if ever

C. if not

D. if any

解析：

由句意可知：他总是乐于助人，如果说他曾经拒绝过别人的话，那也是很不经常的。故选B。