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 will leave
D．what is he leaving for
答案
答案：A
题目分析：句意：---我不知道为什么他要离开。---因为他不得不照顾他的妈妈。宾语从句要用陈述语序。故选A.