His first book ___ when he was only 16.A.published B.has published C.came out D.has been come out
问题描述：
His first book ___ when he was only 16.A.published B.has published C.came out D.has been come out
顺便说一下理由,
答
选C.首先,when引导两件同时发生的事,故而when后面用过去式,其前面也应用过去式,排除B和D.其次,publish表示出版,其主语是物时要用被动语态,而come out 则不用被动语态,排除A