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。