短文改错。

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧）， 并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1. 每处错误及其修改均仅限一词。

            2．只允许修改10处，多者（从11处起）不记分。

     Yesterday, when I visited my cousin, I find he went to the bathroom very often. He

didn't look like alright. "What is wrong about you?" I asked him. "I think I had too many

milk this morning," he said. I asked him how. He said, "My mother went to a supermarket

yesterday afternoon. When she saw some milk on sale, she bought three big bottle. We had

to finish all milk this morning because it was no longer fresh." I knew what she meant. My

aunt wanted to save some money through buy the cheap milk. I real don't think she should

have done that.

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实验室可用下列A或B装置制取氧气，用C装置收集氧气。

（1）写出C装置中仪器的名称：a              ，b               。

（2）如果选用B、C装置制取并收集氧气，回答下列问题：

装入药品前，应先检查装置              ；试管中装入的药品是            ；当观察到C装置中                             时，开始收集氧气；实验结束停止加热时，要先                      ，然后再熄灭酒精灯。