根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    Tolstoy, the great Russian writer, liked to walk about in a railway station near his home. One day when he was walking up and down as usual, looking at people getting on and off the 1, he heard a lady 2 after him, “Hey, you old fellow, go and fetch my handbag in the 3  room which I left there.”

    Tolstoy 4 there. He 5 the bag up and walked quickly along the platform (站台）. At the same time the lady was waiting beside the carriage, looking  6. When at last the old man gave the bag back to her, she opened it to 7 sure nothing was missing. “Good, old man,” said the woman. “You are just as 8 as I hope. Here you are.” Tolstoy 9 the coin and put it into his pocket with a smile.

    But the woman was very 10 when she heard that he was Tolstoy, the author (作者）of the great novel WAR AND PEACE. How interesting it was!

写作
“中国式过马路”现象成为各大媒体热点话题。请你根据以下提示写一篇短文。
“中国式”过马路特点：十字路口，人们成群结队过马路，根本不看交通灯。
后果：每年，很多人因为不遵守交通法规而受伤或丧命。
闯红灯的理由：忙，没时间等；司机应该等行人。
解决办法：分发传单，让更多人知道交通安全的重要性；建更多的人行天桥；惩罚闯红灯者。
要求：
1. 必须包括所有相关信息（不必逐词翻译），可以做适当发挥。
2. 词数90左右（开头、结尾已经给出，不计入总词数）
参考词汇：遵守交通法规：follow the traffic rules       闯红灯：run the traffic lights
行人：pedestrian    传单：leaflet    人行天桥：footbridge
    The Chinese style road crossing has become a hot topic in the media recently. At the crossroads in China, many people ……
    By doing so, we will be able to get around safely.

某课外小组的同学将玻璃罩内充满纯净的二氧化碳气体，如图A所示，在光照充足的条件下，经过一段时间后．该小组同学用注射器从a处抽取气体，测定玻璃罩内气体的成分及其含量．

【查阅资料】

①植物通过光合作用吸收二氧化碳气体，放出氧气．

②二氧化碳能溶于水，1L水大约能溶解1L二氧化碳气体．

③氢氧化钠和氢氧化钙性质相似，其水溶液都能与二氧化碳发生反应．其中氢氧化钠与二氧化碳反应生成水和碳酸钠，且碳酸钠易溶于水．

【方案设计及实验】采用两种方法测定玻璃罩内气体中氧气的含量．

方法1：用如图B所示的装置测量气体中氧气的含量．