问题
选择题
--Has Peter handed in his paper yet?
---I’m not sure. He _______ on it last week.
A．was working
B．has worked
C．worked
D．had worked
答案
答案：A
搜题请搜索小程序“爱下问搜题”
--Has Peter handed in his paper yet?
---I’m not sure. He _______ on it last week.
A．was working
B．has worked
C．worked
D．had worked
答案：A