( ）1.My sister is piaying a piano ________是 My sister错了 还是iss piaying错了 还是a错了,正确的是什么?

My sister is an office worker.（作同义句）1.My sister （ ） （ ） （ ） （ ）.2.My sister ( ) ( ) ( ) . （this）is my sister My sister is（ ）years old. she is my sister. My sister is a my sister is a My sister is a my sister is my sister is my sister is zhangjing is my sister. Her sister is twelve.So is my sister（合并）Her sister is ____ ____ ____ ____my sister My parents'?is my sister? she is my sister (对括号部分提问) 有急用!she is my （sister ） My sister is eight years old（改为同义句）My sister is _____ ______ girl My brother is taller than my sister.(保持愿意） Lily is my sister.I have()sister That girl is my sister.（对划线部分提问） 划线部分是 my sister