If you were to do it,the result______different
A.will beB.would beC.should beD.would have been在线课程B
解析：
考查虚拟语气。根据If you were to do it,可知是指将来，所以主句要用助动词would/could/should/might加动词原形结构。根据句意，结果可能会不同。should be应该是。would be可能是。所以选B。