问题
选择题
_____ I admit that there are problems, I don't' think that they cannot be solved.
A．Unless
B．Until
C．As
D．While
答案
答案：D
搜题请搜索小程序“爱下问搜题”
_____ I admit that there are problems, I don't' think that they cannot be solved.
A．Unless
B．Until
C．As
D．While
答案：D