题目内容：
The time he has devoted in the past years __ the disabled is now considered __ of great value.
A． to help; being B． to helping; to be
C． to help; to be
D． helping; being
参考答案：
答案解析：
单选题：The time he has devoted in the past years __ the disabled is
- 题目分类：英语三级B级
- 题目类型：单选题
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B． to helping; to be
C． to help; to be
D． helping; being