问题:
. 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
. 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 |
参考答案: