分类：教育/科学-外语学习
问题：又一道英语选择题Haveyoudecided______Cana 
 Have you decid ______ Canada?A. when will you leave B. when you will leaveC. when are you leaving D. when you leaving我选B,但答案是D为什么啊? 
回答：Have you decided when（ you leaving Canada定语修饰when）?

是问什么时间离开

如果选B的话后面是个从句，when作为时间副词，并非作为decided的宾语。这样decided的宾语变成when you will leave Canda