-- Are you sure that he will e here in time?--- You may ______ he will e to help us though he is very busy.A.rely upon thatB.rely upon it thatC.rely upon whatD.rely upon it what
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B解析试题分析：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。考点：考查it做形式宾语
点评：英语中有的词组是不能直接加从句的，要先接it再接从句，这样的词组有see to，depend on，relyon等后面都是先接it再接从句。