从方框内选择合适的内容填空，将其序号写在横线上。
A. that woman B. that man C. these girls D. How lovely! E. Who
1．—_______ is that girl?
—She’s my twin sister, Su Hai.
2．—Look at the baby.
—_______.
3．—Are _______ your cousins?
—No, they’re my friends.
4．—Who’s _______?
—He’s my uncle.
5．—Who’s _______?
—She’s my grandma.
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