问题描述：
请将括号内的单词更换一个字母,组成另一个新单词,填在横线上,使句子完整
1.(where)who's that man over____?
2.(thank)I_____it's mine.
3.(that)---_______is this?---It's a pencil.
1.(where)who's that man over____?
2.(thank)I_____it's mine.
3.(that)---_______is this?---It's a pencil.
问题解答：
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