问题
选择题
-----________did your uncle leave his home town ?
----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：句意：你叔叔什么时间离开的家乡？他离开家乡几乎有二十年了。由于leave是非延续性动词不能与how long连用，故用when；根据for nearly twenty years可知，本空应该用延续性动词，故用be away表示“离开”。所以本题选B。
