分类：教育/科学-学习帮助
问题：英语题Ihearthey'vepromotedTom,buthe 
I hear they've moted Tom,but he didn't mention () when we talked on the phone.A.to promote            B.having been promotedC.having promoted       D.to be promoted
回答：mention doing sth.
提拔是被动的，并且已经完成了
因此要用动名词的被动+完成。
答案是：B