( )你向别人介绍你的朋友,你会说: A. This is my family. B. This is my father. C. This is my friend.
___________? He did some reading at home.
I came _______ my house two days ago .
I cleaned my classroom ___________.
—Who was on duty last Friday﹖—______.
______your father at work the day_____yesterday(前天)﹖