A. 根据句意及汉语提示写出所缺单词。
1. Her （青少年的）son wants to become a scientist in the future.
2. The seats in the cinema are （相当）uncomfortable, so few people like to go there.
3. To tell the truth, I am under great （精神压力）before exams.
4. My friend sent me a lot of （明信片）from Beijing yesterday.
5. What fun we have collecting （邮票）! They can tell stories of different countries.

1. teenage
2. quite
3. stress
4. postcards
5. stamps

1. 空格后是名词son，需要填入形容词作定语，对应汉语“青少年的”的英文单词是teenage。
2. 空格后是形容词uncomfortable，需要填入副词修饰该形容词，对应汉语“相当”的英文单词是quite。
3. 固定短语under great stress意为“承受巨大的精神压力”，stress表示精神压力，为不可数名词，符合语境。
4. 短语a lot of后接可数名词复数或不可数名词，“明信片”的英文是postcard，此处要用复数形式postcards。
5. 此处表示泛指邮票这一类物品，“邮票”的英文是stamp，是可数名词，要用复数形式stamps来表示类别。

B. 用方框中所给单词的适当形式填空，其中有一个多余项。
object push reduceItaly program coin
1. Leonardo da Vinci was an painter, inventor and musician.
2. His dream job is to be a computer in the future.
3. We mustn't throw any from the tall building. It's very dangerous.
4. air pollution, our city puts many shared bicycles into use.
5. Betty has many hobbies, such as collecting and playing football.

【解析】1. 句意：达芬奇是一位意大利画家、发明家兼音乐家。此处需要形容词修饰名词painter，名词Italy对应的形容词形式是Italian，意为“意大利的”，符合语境。
2. 句意：他的理想工作是未来成为一名电脑程序员。此处表示职业，名词program对应的表示职业的名词是programmer，意为“程序员”，符合“电脑程序员”的表达。
3. 句意：我们不能从高楼上扔任何物品，这非常危险。any后接可数名词复数，名词object的复数形式objects，意为“物品、物体”，符合语境。
4. 句意：为了减少空气污染，我们城市投放了很多共享单车。此处用不定式作目的状语，填入To reduce，句首首字母大写。
5. 句意：贝蒂有很多爱好，比如收集硬币和踢足球。此处表示泛指硬币，可数名词coin要变为复数coins，符合“收集硬币”的表达。
本题给定单词中push为多余项，符合题目要求。
【答案】1. Italian
2. programmer
3. objects
4. To reduce
5. coins

C. 根据所给单词的适当形式填空。
1. Our English teacher often tells us if we have any difficulty learning English, we can ask her for (suggest).
2. Don't be afraid of (fail)—it's a part of the process of learning something new.
3. (surprise), even the youngest student in our class solved the difficult maths problem.
4. In the past, the scientist's story (inspire) our parents to work harder for their dreams.
5. More (important), we should always be kind to others and respect different opinions.

1. suggestions 2. failing 3. Surprisingly 4. inspired 5. importantly

1. 空格前的介词for后需接名词作宾语，动词suggest对应的名词形式为suggestion，此处表泛指多条建议，用复数形式suggestions，构成固定搭配ask sb. for suggestions 向某人寻求建议。
2. 固定搭配be afraid of doing sth. 意为“害怕做某事”，介词of后需接动名词，动词fail的动名词形式为failing。
3. 此处位于句首，用来修饰整个句子，需用副词作状语，surprise对应的副词形式为Surprisingly，首字母大写，意为“令人惊讶的是”。
4. 时间状语In the past（在过去）是一般过去时的标志，谓语动词要用过去式，inspire的过去式为inspired。
5. 固定短语More importantly意为“更重要的是”，常用于句首作状语，此处需将形容词important变为副词importantly。