单选题 He asked no one's permission; he did it ______ his own account.
【正确答案】 C
【答案解析】(on one's own account为自己的利益)。句意为:他没有征得大家的许可,做这件事是为了自己的利益。A.for为了;D.with和……在一起;D.from来自。