( )(3) ____ is my sister .A. Her B. He C. She
What class are you ________?A.at B.in C.on
How old ________ your brother?A.is B.are C.does
Where ________ your father now?A.is B.are C.was
I can't ________ my key.A.look for B.find C.look
I was born ________ Beijing.A.at B.in C.on