阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Lori：Good morning, Chuck. Are you here____(wait) for Professor Johnson?

Chuck：Oh, yes. Good morning, Lori. The professor asked me to come here ____(have) an interview. Do you know something about the job as ____ teacher's assistant?

Lori：Oh, yes. I know all about it ____ Ihave work experience in this field. Last year, I did it for a long time.

Chuck：Really? How did you like ____？

Lori：Well, actually I think it was____(good) I had ever had at school. I was paid nine dollars an hour, which____(be) three dollars more than the school post office paid us.

Chuck：Yeah, I bet this is a good salary. But what did you do?

Lori：My responsibility was to help Professor Johnson grade the students' homework. It wasn't hard and the professor was always available ____ there were any questions. I ____ improve myself through doing this job.

Chuck：I think I would enjoy this kind of work. But I'm a little worried about how much ____ it might take.

Lori：Only about five or six hours a weekand you can do that in your room.

Chuck：It sounds good.

【查阅资料】白磷的着火点40℃．

【提出问题】氧气体积约占空气总体积的多少？

【实验准备】锥形瓶内空气体积为230ml，注射器中水的体积为50ml，该装置气密性良好．

【实验探究】装入药品，安图所示连接好仪器，夹紧弹簧夹，先将锥形瓶底部放入热水中，白磷很快被引燃，然后将锥形瓶从热水中取出．

【现象分析】

a.将锥形瓶底部放入热水中，白磷被引燃，看到实验现象是____．足量的白磷在锥形瓶中未能全部燃烧，说明瓶内剩余气体____燃烧（填“支持”或“不支持”），写出白磷燃烧的文字表达式：____．

b.在整个实验过程中，可观察到气球的变化是____．

c.待白磷熄灭、锥形瓶冷却到室温后，打开弹簧夹，还可观察到的现象是：①注射器中的水自动喷射出来；②当注射器中的水还剩约____ ml时停止下流，导致这些现象发生的原因是：____；____．

【得出结论】氧气约占空气总体积的 $\frac{1}{5}$ ．

下面语段划线处都有语病，请根据提示加以改正。
        读书是一种发自内心的选择。当一个人强迫着自己作出某种读书姿态的时候，他其实是在折磨自己了。读书是一种心灵义务。一个人，①如果没有把一段青春时光拜托给高贵的思想和真诚的文字，那么，他就是自己的敌人，②这是因为他放弃了对自我心灵的塑造的原因，③错过了在读书时光中体会"物我两忘"。这一机缘，错过了，就永远无法弥补。④当你重新拾起书本回过头来的时候，你会发现自己是何等陌生。古人三日不读书，便觉得面目可憎，更何况是错过了一段读书的岁月呢﹖
        A第①处搭配不当，应将   改为        
        B第②处句式杂糅，应改为         
        C第③处成分残缺，应在   后添加       
        D第④处语序不当，应调整为