The time he has devoted in the past years the homeless is now considered of great value.

问题补充：

The time he has devoted in the past years the homeless is now considered of great value.

A. to help; being

B. to helping; to be

C. to help; to be

D. helping; being

答案：

A. to help; being

(答案→)B. to helping; to be

C. to help; to be

D. helping; being

解析：句意：在过去几年，他投入到帮助无家可归的人上的时间现在被认为是很有价值的。第一空填to helping，使用了词组“devote time to doing”花时间做…，第二空填to be，使用的是consider …to be“认为…是什么”，所以选B。