李先生到百货大楼买了一台电视，经过讨价还价最终决定购买展柜里的样品，由于样品陈列在外，显得有些陈旧，原价5000元，现百货大楼只卖给李先生3500元，二者约定明天付款。但晚上百货大楼发生了火灾，电视被烧毁，李先生拒绝付钱，并声称该由百货大楼承担责任，李先生的说法有道理么？你的观点呢？
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白云石化和硅化的蚀变围岩是寻找铅锌矿床的重要标志。()
The author suggests that children should be outside kicking a ball around rather than______.
A. researching technological change
B. playing video games
C. going to school
D. traveling to other countries such as Malaysia
The underlined word in Paragraph 1 means______.
A. lost
B. prosperous
C. fading
D. professional
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