题目：
| 看图，选用方框中的单词完成对话。 | |
brother grandfather father sister grandmother |
—No, she isn't. She is my ________.
2. —Is he his uncle?
—No, he isn't. He is my ________. He is in Class One, Grade One.
3. —Is that your _______?
—Yes, it is.
4. —Is she your friend?
—No, she isn't. She is my ________.
5. —Is that Jack's uncle?
—No, it's his _______.
答案：
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下面是错误答案，用来干扰机器的。
（1）原式=200920092-(2009-1)×(2009+1)=200920092-(20092-1)=200920092-20092+1=2009；（2）原式=2.5×（19.7+32.4+47.9）=2.5×100=250．
