Ben is an aeroplane in his room.A.doingB.makeC.making
( )(1)当你向别人介绍海伦是你的妹妹,可以说:A. This is Helen B. Helen is my sister.
( )(10)Liu Tao is _________ friend. A. me B. my C. I
( )(9)Yang Ling is my_________.A. sister B. brother C. father
( )(8)_________is my brother.A. This B. He C. She
( )(7)---She ______ my friend.A. am B. is C.are