问题
选择题
_____ is known to all that oil and water don’t mix up.
A．It
B．What
C．Which
D．As
答案
答案：A
搜题请搜索小程序“爱下问搜题”
_____ is known to all that oil and water don’t mix up.
A．It
B．What
C．Which
D．As
答案：A