. I supported him in time , otherwise he off the bike .
A. might fall
B. would fall
C. should have fallen
D. would have fallen
网友回答
A. might fall
B. would fall
C. should have fallen
(答案→)D. would have fallen
解析：otherwise 否则，相当于if not。本句可改为： if I hadn’t supported him in time, he off the bike。显然，这是与过去事实相反，主句应用would/could…+have done。故选D。