I have already told our class teacher that the windows of our classroom require .
A. repairing
B. being repaired
C. to repair
D. repaired
网友回答
(答案→)A. repairing
B. being repaired
C. to repair
D. repaired
解析：考查动词用法。require doing = require to be done需要（被）做，根据句意选A。