书面表达。

   根据下面的提示和要求写一篇短文。

    提示：yesterday, Monday, Mr Li, busy, get up, have breakfast, meet friends at home,

pick up his things, go to Beijing by plane

    要求：1.条理清楚，意思连贯，语句通顺，标点正确，书写规范； 

              2. 将提示内容全部体现在文章中；

              3. 词数50-60。 

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完全燃烧2.00g有机物，可生成4.40g CO₂和1.44g H₂O，则该有机物的化学式为（　　）

A．C₅H₈

B．C₅H₈O

C．C₅H₈O₂

D．C₁₀H₁₆O₄