问题
单项选择题
Don't disturb me. I（）letters all morning and have written ten so far.
A.write
B.have written
C.was writing
D.have been writing
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
Don't disturb me. I（）letters all morning and have written ten so far.
A.write
B.have written
C.was writing
D.have been writing
参考答案：D