Who is the girl playing the piano on the square?play怎会为ing形式?还有这句话是不是主系表?哪个是表语?

who is the girl? Who is the beautiful girl Who is that girl (plays playing play is playing) the piano over there选择括号中的哪个 who is the girl ( ) the hat?紧急! Who is the girl ( )blue.填空 who is the girl in red who is the girl （ ） red who is the girl a red hat? who is the girl?hui jia fen who is the girl () long hair? Who is the girl who is making a telephone call? .She is the tallest girl in her class.She can play the violin.（合成一句）可以说 She is the tallest girl that who can play the violin in her class. Who is the boy and the girl 还是Who are the boy and the girl Who is the girl playing the piano on the square?play怎会为ing形式?还有这句话是不是主系表?哪个是表语? 请问Who is the girl?和Who is this girl?意思有什么不同? 填冠词 Who is the ( ) girl she is ( ) my sister Who is your cousin?The girl in( ) is Who is the girl that is making a telephone call?