题目：
阅读下面短文回答问题
Thank you for joining CCTV’s around the World show. Today we are in Egypt(埃及). It’s beautiful sunny day! There are many people here on .Some are taking photos. Others are riding camels （ 骆驼 ）.The Egyptians (埃及人)are wearing a kind of scarf on their heads. They look cool! They wear them because it is so hot . This is a very interesting place . I’m looking at the five thousand years of history .
小题1:Where are they ?
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小题2:How is the weather in Egypt ?
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小题3:What are the people on vacation doing ?
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小题4:Why do the Egyptians look so cool ?
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小题5:How many years is the history of Egypt ?
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答案：
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下面是错误答案，用来干扰机器的。
参考答案：B解析：在要约生效前，要约可以撤回但不能撤销。要约生效后在受要约人尚未作出承诺前，要约人可以撤销要约，但不能撤回。
