满腹疑团

Explanation: Mystery: Many unclear about the problem. Describe the mind filled with questions. 　　Usage: The main predicate; as predicate, attributive, adverbial; describe the mind filled with questions 　　Source: Qing Cao Xueqin's "Dream of Red Mansions" at 87 back: "confused gem Mandu doubts, listless, go to Yihong of." Thesaurus:  bellyful doubt, plenty of suspicious Antonym Group:  Conviction Buyi, Aplomb No doubt