阅读下列短文，从每题所给的四个选项中（A, B, C, D）, 选出最佳选项。

    There is a scene in the movie The Descendants and it went something like this ---George Clooney's character Matt King has a daughter who may be 9 or 10. She said something bad to a girl at her school that made her cry. The mother of that girl made Matt and his daughter come to their house to apologize. “Sorry,” said his daughter very casually. She was clearly not sorry for her actions and the girl's mother complained she didn't take her apology seriously. Matt shrugged(耸) his shoulders. What was he supposed to do? His daughter apologized as asked. He couldn't make her mean her words.

    I always think of this story when my daughter is asked by other adults to apologize for her wrong doings. I know my daughter is being taught to say “sorry” with all the best intentions. They are teaching her to be polite. But she is apologizing because she is being forced to please the adult or to avert punishment.

    This situation has happened on a few occasions and it really bothers me. Here are three reasons why I don't think it's a good idea to teach children to say sorry: 1. My daughter is being taught to say things that are not from her heart. 2. She is being taught insincerity(不真诚) is valued over genuineness. 3. She is being taught she needs to please others to be loved.

    These messages make me uncomfortable and I will not ask my children to apol ogize. Instead, this is what I think people should teach children:

    teach them behavior that is acceptable and to practice positive behavior.

    teach them how their actions affect others.

    give them space to think about the situation and ask them to suggest ways to make the situation better.

    help them make healthy choices

    lead by example and show them how to fix wrong doings

阅读下面文章，完成下列各题
                                                                                                         只管向前奔跑
                                                                                                                                     崔修建
        ①贝基拉出生在埃塞俄比亚的一个贫苦的家庭，很小的时候，他就渴望成为一名驰聘赛场的长跑健将。他时常站在训练场边，羡慕地看着运动员们训练。但极度贫寒的家境，让他自卑得有些差愧——他不仅拿不出训练费，连最便宜的普通跑鞋也买不起。
        ②那天，贝基拉不知不觉地又走到训练场边，望着跑道上那些奔跑的身影，他既羡慕又难过，心头奔跑的热望亮起来，又暗淡下去。
        ③一位跨栏教练员听了贝基拉的倾诉，将他带到一组很矮的栏杆前，让他一路跑过去,他轻松地跨越一个个栏杆；教练员又指了指那组已升高到足有1．5米的栏杆前让他再试一试。他努力了好几次，也没能跨过去。
        ④这时，教练员平静地告诉他：“孩子，你刚才所说的那些困难，就像眼前的这一道道栏杆，它们会横在每个人的面前，那些你现在跨不过去的栏杆，可以在一次次的失败后，最终跨越它们，你还可以踢翻它们，也可以绕过它们，你只需盯准你向往的前方，只管努力地向前奔跑，相信没有什么可以拦住你的梦想。”
       ⑤教练员的一席话重新点燃了贝基拉的希望，从此，买不起跑鞋的贝基拉开始了他坚定而执著的赤脚奔跑训练，广袤的原野、泥泞的山路、坚硬的戈壁滩上……随处可见他奔跑的身影，他已练出了一双铁脚板。数年后，他成了埃塞俄比亚著名的马拉松运动员。
        ⑥1960年罗马奥运会马拉松赛场上，贝基拉一出现，便引起人们的关注，因为他是唯一赤脚的运动员。在数万名现场观众热烈的掌声中，贝基拉为他的祖国赢得了一块沉甸甸的金牌。
        ⑦距1964年的东京奥运会开幕还有二十多天，贝基拉动了一次手术，很多人以为他会放弃比赛。然而，三十二岁的他不仅出现在马拉松赛场上，而且再夺金牌，成为奥运史上第一个蝉联这个项目冠军的选手，也成为埃塞俄比亚的民族英雄。
       ⑧面对蜂拥而至的记者，贝基拉激动地感慨道：“一切都很简单，只要站在跑道上，就没有什么障碍可以拦住奔跑的雄心，就只管向前，再向前，一路向前地奔赴梦想的终点。”
        ⑨没错，大千世界中我们每个人的面前，都可能会横着一些诸如清贫、疾病、磨难之类的障碍，只要不失去向前奔跑的雄心，就能勇敢地跨越它们，踢翻它们，绕过它们，就会抵达梦想的前方。

①20mL蒸馏水                             

②30mL 0.03mol/L HCl溶液

③40mL 0.05mol/L AgNO₃溶液                   

④50mL 0.02mol/L CaCl₂溶液．