假设你们班级在开展英文文学作品阅读活动。请你阅读四则作品片段，在A、B、C、D中找到它们所表达的主题，并完成下面小题。

Dear Editor，

    I'm a high school student. One day，on my way to school I found that along the river bank in Zhaowang River Park，the road was badly destroyed and some color bricks had disappeared，which would affect people's going out. ①Perhaps these bricks were carried away by some people nearby and kept by themselves. ②我对此事感到伤心。

    Since the public facilities are often destroyed like that，I suggest that our government should repair the road as soon as possible and take some measures to protect these public facilities. And as to us students，whenever we find someone destroying our public facilities，we should make efforts to stop him or her in time. Only in this way can we have a more beautiful and comfortable city to live in.

Li Qiang

    Some people seem have unusual memories. Zheng Aiqiang, a" memory athlete" on TV show Super Brain, can remember 2, 660 numbers in just one hour!

    You would think people like him must have special brains. But

according to a recent study by researchers from America and Holland, the brain structure(结构) of ordinary people and 23 of the world's leading memory athletes shows no difference.

    Good memories can be trained. New research in the magazine Neuron suggests that a person will get a super memory with just six weeks of hard training.

    Researchers found that a technique (技巧) called loci, invented by the ancient Greeks, can greatly help improve memory.

    By using loci, you are using your imagination to improve the brain's memory networks. You can link (关联) something you need to remember with a place that you know very well. For example, to remember a list of numbers, imagine yourself walking through your house. Each thing is linked to a number. For example zero could be the handle on the door and five could be the painting on the wall.

    In one study, some ordinary people were given 20 minutes to remember 72 nouns. At the beginning, they could only remember 26 words, but when they were taught loci, they could remember 62 words.

    "Not everyone can become a memory winner. But everyone using the technique can improve his memory greatly," said Boris Konrad, one of the researchers in the study.

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