We won't know whether it will be successful. We won't know whether there will be good .A.

问题补充：

We won know whether it will be successful. We won know whether there will be good .

A. ends

B. results

C. effects

D. causes

答案：

A. ends

(答案→)B. results

C. effects

D. causes

解析：result意为“由某种活动或某种原因所产生的结果”，如：obtain(=get, attain, gain win, secure)good results（取得好结果），publish the results（公布成绩）。