问题
选择题
— I can't believe it! I only got a B on my project.
— That's not a bad grade.
— But I _____ on it for weeks. [ ]
A. am working
B. have worked
C. work
D. worked
答案
答案：D
搜题请搜索小程序“爱下问搜题”
— I can't believe it! I only got a B on my project.
— That's not a bad grade.
— But I _____ on it for weeks. [ ]
A. am working
B. have worked
C. work
D. worked
答案：D