The reason ______she didn’t come to school was_____she had to look after her sick mother.

My parents kept their _____and took me to Shanghai, where we had ____.

—Could you do me a favor?—It depends on _______ it is. 

----Have you seen Mr. Black these days, Jack? ----Yes, I met him when I ________ in the street yesterday.

 It’s based on the idea ____ all people are created equal, ____ is accepted by most people.