问题
选择题
— ________ did your uncle leave his home town?.
— Let me see. He _______ for nearly twenty years.
A．When; has left
B．When; has been away
C．How long; has left
D．How long; has been away
答案
答案：B
题目分析：—你叔叔什么时候离开的家乡？—让我想想，他离开有近二十年了。第一空是问“什么时候”，所以用when；第二空和时间段for nearly twenty years连用，也有现在完成时态，同时谓语动词要用延续动作动词，故选B。