An old man has spent all his life in a small village which is far from the city. One day, someone told him some interesting things about the city. He was so amazed at it that he decided to visit it. Everything was new and strange to him. The old man got excited and visited a lot of interesting places. Then he went into a large tall building and saw a lift. He didn’t know what it was used for. As he was watching it, an old woman got into the lift and the door closed behind her. After a few minutes, the door opened and a very beautiful young girl came out. The old man was very surprised. “What an interesting little room!” he said to himself, “Terrific, it can change an old woman into a young girl. I will be here with my wife next time.”

Fill in each blank according to the passage. Only one word for each blank.

From the passage, we know that the old man went to the city for the小题1: __________ time. He was very excited and surprised at what he saw. He didn’t know what the lift 小题2:__________. One day, he saw that an old woman 小题3:__________ the lift, then after a while a very beautiful girl came out, he decided to 小题4: __________ his wife here and 小题5: __________ her beautiful and young the next time.

（8分）随意丢弃废旧干电池会造成环境污染，而废旧干电池中的许多物质都是可以回收利用的。请根据右图回答下列问题：

（1）图示中属于非金属单质的是       ，属于氧化物的是       （写化学式）。

（2）将锌皮洗净后可用于制取氢气，则锌与稀硫酸反应的化学方程式为             。

（3）取干电池内的填充物溶于水，过滤，得到A的溶液和黑色不溶物，灼烧黑色不溶物得MnO₂。

①MnO₂在实验室制取氧气中起的是             作用；

②将A的溶液分为两份，一份加入烧碱溶液，加热产生一种刺激性气味的气体，它能使湿润的红色石蕊试纸变蓝色，可知该气体的化学式为      ；另一份加入AgNO₃溶液，产生白色沉淀，滴加稀HNO₃沉淀不溶解，则可推知A物质的化学式为          。