What (animal) does he like best?
注：如果理解没有困难,则animal省略亦可.那应该还差一个词额！总共三空么？到底几空？可以不可以写成变化格式来？比如：___ ___ ___ does he like best？之类。does he like best? 前面有两个空那答案就是：(What animal）does he like best?