问题
选择题
--- I hear Robert has gone to Harvard University for his master’s degree.
--- Oh, how nice! Do you know when he ____?
A．was leaving
B．left
C．had left
D．has left
答案
答案：B
搜题请搜索小程序“爱下问搜题”
--- I hear Robert has gone to Harvard University for his master’s degree.
--- Oh, how nice! Do you know when he ____?
A．was leaving
B．left
C．had left
D．has left
答案：B