She is a girl.Look,she is doing Chinese dances.她是一个漂亮的女孩。看她正在跳中国舞。she 是3人称单数，所以用is。look是现在进行时的标志，所以用is加动词的ing形式。
She __is__ (be) a pretty girl. Look, she _does_ (do) Chinese dances
