基础题
基础题：
题目：请根据提示，用英语描述手机（mobile phones）的一个优点和一个缺点，并说明原因。
提示：优点-方便联系（convenient to contact）；缺点-辐射/视力（radiation/eyes）。
解答过程：
1. 确定主语：Mobile phones.
2. 构造优点句（一般现在时/过去时皆可，侧重事实）：They are convenient because we can contact friends easily.
3. 构造缺点句（侧重负面影响）：However, they may hurt our eyes if we use them too long.
4. 组合：Mobile phones are convenient because we can contact friends easily. However, they may hurt our eyes if we use them too long.
变式题：
题目：假设你在讨论“是否应该在学校禁止使用平板电脑”。请结合“环保”和“学习效率”两个角度，写一段包含利与弊的短文（3-4句）。
解答过程：
1. 立场引入：Tablets in school have both pros and cons.
2. 利（效率）：On one hand, they make learning faster and more interesting. (使用过去时回顾体验：Last term, we finished reading tasks quickly with them.)
3. 弊（环保/健康）：On the other hand, producing tablets uses a lot of energy and creates e-waste. (关联环保建议：We should think about the environment.)
4. 结论：So, we should use them wisely.