问题
选择题
I am tired. I ______ all day.
A．am working
B．have been working
C．worked
D．have been worked
答案
答案：B
本题句意“我很累。我一直在工作。”all day说明时间的持续。
搜题请搜索小程序“爱下问搜题”
I am tired. I ______ all day.
A．am working
B．have been working
C．worked
D．have been worked
答案：B
本题句意“我很累。我一直在工作。”all day说明时间的持续。