He unwisely, but he was at least trying to do something helpful.
A. may have acted
B. must have acted
C. should have acted
D. would act
网友回答
(答案→)A. may have acted
B. must have acted
C. should have acted
D. would act
解析：句意：他的行为也许不明智，但是他至少能够尝试做一些有帮助的事了。may have done可能已经做了；must have done一定做过某事；should have done应该应经做过某事； would done过去将要做。根据句意故选A。