Is that your mother ,Dave Yes ,it is.为什么要用it 呢

Is that your mother 肯定回答 Is that your mother为什么Is要在that的前面.This is your mother/is在this后面? Is this/that your mother?提问什么回答急! and is that your mother的答句 Who is that girl ( ) your mother and father wang bing,is that your mother purse 怎么错的? Is that your mother?答语是不是Yes,that is.和Yes,it is. What is your mother what is your mother? Where is your mother? who is your mother Is your mother是什么意思 Is your mother thin? is your mother in Is your mother thin? Is your mother in? He's your mother's son,but he is your brother That's_____ he is your mother is son（ 儿子） ,but he is not your bother that is ( 急求了,