一、根据汉语提示写出单词
1. The (表面) of the lake was calm and reflective.
2. Listening to soft music can help us reduce (压力) in daily life.
3. The (目的) of our environmental activity is to promote low-carbon living.
4. Stepping onto the glass bridge, I didn't (敢) to look down into the deep valley at all.
5. When I saw the report card, I (意识到) I needed to work harder.

1. surface 2. stress 3. purpose 4. dare 5. realized

【分析】本题要求根据汉语提示写出正确的英语单词，解题思路为：先理解每个句子的语境，找到对应汉语含义的英语词汇，再结合句子的语法规则（如动词时态、固定搭配）确定单词的正确形式，最终完成填空。
【解析】1. 句意为“湖面平静且反光”，“表面”对应的英语名词是surface；2. 句意为“听轻音乐能帮助我们减少日常生活中的压力”，“压力”对应的英语名词是stress；3. 句意为“我们环保活动的目的是推广低碳生活”，“目的”对应的英语名词是purpose；4. 句意为“踏上玻璃桥，我一点也不敢往下看深谷”，didn't后接动词原形，“敢”对应的英语动词是dare；5. 句意为“当我看到成绩单时，我意识到需要更努力学习”，由saw（see的过去式）可知句子为一般过去时，“意识到”对应的英语动词过去式是realized。
【答案】1. surface 2. stress 3. purpose 4. dare 5. realized
【知识点】英语单词拼写、名词词义、动词时态
【点评】本题是基础单词拼写题，考查常见名词、动词的词义及形式，需注意动词时态和固定搭配（如助动词didn't后接动词原形），难度较低，适合基础巩固练习。
【难度系数】0.3

二、用所给单词的适当形式填空
1. Eating more fruit and vegetables helps us stay (health).
2. Mum, I don't want to eat anything. I seem to have a (stomach).
3. Some of us are better at helping others than we are at looking after (we).
4. Bill didn't finish the work because he had a terrible (head).
5. Last year, I had a bad (tooth) and needed to see the doctor.
6. Remember to be (thank) for the difficulty you have met. It helps you grow up.
7. After treatment, she can now walk (normal) as usual.
8. Everyone thought it was a (joy) day because the whole family spent the Spring Festival together.
9. Parents should pay attention to their children's online (behave) and correct it in time to ensure they use the Internet safely and politely.
10. The thunder was too loud last night, and I stayed (wake) until early morning.

1. healthy 2. stomachache 3. ourselves 4. headache 5. toothache 6. thankful 7. normally 8. joyful 9. behavior 10. awake

【分析】
本题为英语用所给单词适当形式填空题型，需结合句子结构、固定搭配及语境判断所需词性，再对所给单词进行正确变形。需注意系动词后接形容词、修饰动词用副词、固定短语搭配、反身代词用法等规则。
【解析】
1. stay是系动词，后需接形容词作表语，health的形容词形式为healthy；
2. 固定搭配have a stomachache表示“胃痛”，stomach变形为stomachache；
3. 主语为we，look after后需接反身代词，we的反身代词是ourselves；
4. 固定搭配have a headache表示“头痛”，head变形为headache；
5. 固定搭配have a toothache表示“牙痛”，tooth变形为toothache；
6. be动词后需接形容词作表语，thank的形容词形式为thankful；
7. 修饰动词walk需用副词，normal的副词形式为normally；
8. 修饰名词day需用形容词，joy的形容词形式为joyful；
9. online后需接名词，behave的名词形式为behavior；
10. stay是系动词，后需接形容词作表语，wake的形容词形式为awake。
【答案】
1. healthy 2. stomachache 3. ourselves 4. headache 5. toothache 6. thankful 7. normally 8. joyful 9. behavior 10. awake
【知识点】
词性转换、固定搭配、反身代词
【点评】
本题考查英语基础词性变形及常用固定短语，属于英语学习的核心基础题型，需掌握常见词性转换规则和固定搭配。
【难度系数】
0.8