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改错
is that?________
读问句，选择正确的答案。
( )Is that ball yours?
A．Yes, it’s ours．
B．Yes, it’s theirs．
完成对话：
A:Today is Halloween.
B: is that?
A:It is a festival.
A. Where B. What C. Who
填空，完成下列对话
-- is that woman?
-- She is my mother.
is that?
________
