问题

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;
B:to helping; to be
C:to help; to be
D:helping; being;
正确答案是:
同类题型
er I made mistakes, the teacher pointed them out with _____.
You can never imagine what great difficulty I have ________ your house.
in the woods, the cottage was a good shelterfrom the enemies.
The traffic was _________when the caraccident happened .
She is an excellent student in our class, and she always herself in her studies.