问题
单项选择题
All these days he ______ on his paper.
A.has worked
B.has been working
C.was working
D.is working
答案
参考答案:B
解析: all this (these) day(s),month(s),year(s)等时间状语一般与现在完成时连用,意为“一段时间以来一直在……”,强调动作的持续,不注重结果。