阅读名著。
         越不肯努力便越自怜。以前他什么也不怕，现在他会找安闲自在：刮风下雨，他都不出车；身上有点酸痛，也一歇就是两三天。自怜便自私，他那点钱不肯借给别人一块，专为留着风天雨天自己垫着用。烟酒可以让人，钱不能借出去，自己比一切人都娇贵可怜。越闲越懒，无事可做又闷得慌，所以时时需要些娱乐，或吃口好东西。及至想到不该这样浪费光阴与金钱，他心里永远有句现成的话，由多少经验给他铸成的一句话：“当初咱倒是要强过呢，有一丁点好处没有？”这句话没人能驳倒，没人能把它解释开；那么，谁能拦着祥子不往低处去呢？      

C

    In England, people often talk about the weather because they can experience (经历) four seasons in one day. In the morning the weather is warm just like in spring. An hour later black clouds come and then it rains hard. The weather gets a little cold. In the late afternoon the sky will be sunny, the sun will begin to shine, and it will be like in summer at this time of a day.

    In England, people can also have summer in winter, or have winter in summer. So in winter they can swim sometimes, and in summer sometimes they should take warm clothes.

    When you go to England, you will see that some English people usually take an umbrella (伞) or a raincoat with them on a sunny morning, but you should not laugh at them. If you don't take an umbrella or a raincoat, you will probably regret (后悔).

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过14个字。

    如果你在微弱的灯光下看书，父母可能会警告你说，____。实际上，这种说法并不正确。灯光昏暗，你的瞳孔将根据周围的光环境进行自我调整，眼睛不会受到伤害。父母的误解，可能和生活体验有关：当人们在昏暗环境下看书时，眼部持续紧张，很容易感到疲劳，可能出现____的情况，于是就以为近视与昏暗光线有关，其实，上述症状并不持久，____，根本不会对视力造成影响。

小张同学探究“凸透镜成像规律”的实验装置如图所示，其中焦距为15cm的凸透镜固定在光具座上50cm刻度线处，光屏和蜡烛分别位于凸透镜两侧．