问题
选择题
I letters since then, but I haven't finished them yet. [ ]
A. have written
B. have been writing
C. wrote
D. has been writing
答案
答案：B
搜题请搜索小程序“爱下问搜题”
I letters since then, but I haven't finished them yet. [ ]
A. have written
B. have been writing
C. wrote
D. has been writing
答案：B