问题
选择题
___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.
A．While
B．When
C．As
D．Since
答案
答案：A
搜题请搜索小程序“爱下问搜题”
___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.
A．While
B．When
C．As
D．Since
答案：A