-- Are you sure that he will come here in time?You may he will come to help us though

问题补充：

-- Are you sure that he will come here in time?

--- You may he will come to help us though he is very busy.

A. rely upon that

B. rely upon it that

C. rely upon what

D. rely upon it what

答案：

A. rely upon that

(答案→)B. rely upon it that

C. rely upon what

D. rely upon it what

解析：考查it做形式主语，词组rely on后面不能直接接从句，要先接it做形式宾语，再接that从句，句意：--你确信他会准时到这儿吗？--你可以相信虽然他很忙他肯定会来帮我们的。选B。