问题

The time he has devoted in the past 10 years____ the disabled is now considered ____ of great value.[ ]
A: to helping;to be
B: to help;being
C: to help;to be
D: helping;being
B: to help;being
C: to help;to be
D: helping;being
正确答案是:
同类题型
We thought of selling this old furniture, but we have decided to _______ it.It might be valuable.
There used a tree in front of the house, but now it is cut down.
Have you seen the film Painted Skin ______ leading actor is world-famous?
you mean that we have lost our way—_____, my dear. We’d better ask someone for help.