在英语考研改错题中，考生需仔细阅读给出的段落，找出并改正其中的错误。以下是一段典型的考研英语改错题及答案：
【原文】
The weather has been so hot in recent days that we all feel exhausted. To cool off, we went to the beach, but the water was so cold that we couldn't even swim. I thought it would be a good idea to bring an umbrella to shade us from the sun, but when I looked at the weather forecast, I realized that it was going to rain in the afternoon. However, I was wrong. The sun shone brightly and it was not until we left the beach that it started to pour. We had a terrible time getting back to the city.
【改错及答案】
1. The weather has been so hot in recent days that we all feel exhausted. (无误)
2. To cool off, we went to the beach, but the water was so cold that we couldn't even swim. (无误)
3. I thought it would be a good idea to bring an umbrella to shade us from the sun, but when I looked at the weather forecast, I realized that it was going to rain in the afternoon. (无误)
4. However, I was wrong. The sun shone brightly and it was not until we left the beach that it started to pour. (无误)
5. We had a terrible time getting back to the city. (无误)
【解析】
本题中，所有句子均无误，无需修改。
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