I know little about his family except that his daughter is s

I know little about his family except that his daughter is s everybody, that is ,except his six-year-old daughter -----thinks he is clever,but ----except his family know how everybody,that is,except his six-year-old daughter,Jenny.其中的 that is his family photo. 为什么要用定语从句啊?比如I little know that she is his sister.为什么要用that啊 I want to know——A.what is his name B.what's his name C.that He is always ______(担心)his little daughter That is a picture of his family I know nothing about them except that they are Russians. Mr Smith is John's f____.Marry is his daughter. Tom ,about,telling,is,his,presents,christams,family＇ s,Lucy连