单项选择题
It’s based on the idea（）all people are created equal，（）is accepted by most people.
A.that；thatB.which；whichC.which；whenD.that；which
单项选择题 Barack Obama，（）African America，was elected as（）56th President of the United states.
单项选择题 It is not （）to discuss the questions again and again.
单项选择题 Their working conditions（）the same （）before.
