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。

单项选择题
单项选择题