问题
选择题
Mary was only too ready to help others, seldom, _____, refusing them when they turned to her. [ ]
A. if never
B. if not
C. if any
D. if ever
答案
答案：D
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Mary was only too ready to help others, seldom, _____, refusing them when they turned to her. [ ]
A. if never
B. if not
C. if any
D. if ever
答案：D
