读对话，圈出合适的单词。
A:
Look! This is my family.
A: Who's that {#blank#}1{#/blank#} (boy /
girl)?
B: She's my sister.
A: Is the {#blank#}2{#/blank#} (man /
woman) your mother?
B: Yes, she is.
A: {#blank#}3{#/blank#} (What's
/ Who's) that boy?
B: Guess.
A: Is he {#blank#}4{#/blank#} (you /
your) brother?
B: No, he {#blank#}5{#/blank#}(is /
isn't). He's my friend.
