When I knew Mary made every effort the homeless I could not but her.A. to help; admire

问题补充：

When I knew Mary made every effort the homeless, I could not but her.

A. to help; admire

B. to help; to admire

C. helping; admire

D. help; admiring

答案：

(答案→)A. to help; admire

B. to help; to admire

C. helping; admire

D. help; admiring

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