问题
选择题
I don’t know________.
Because he has to look after his mother.
A．why he is leaving
B．why is he leaving
C．whether he is leaving
D．whether is he leaving
答案
答案：A
英语宾语从句中一般用陈述语序。根据下文，因为他必须照顾她的母亲。可知上文提问的是原因，选项B为倒装语序，故选A，我不知道他为什么离开了。