四、仿写句子。
1. I'm a little seed. (big, leaf ______ )
2. What are you doing?（Sam ______ ）
3. Are you planting a seed? (water, flowers ______ )
4. They're picking cotton. (I, apples ______ )
5. He's reading a book. (We, play football ______ )

1. I'm a big leaf.
2. What is Sam doing?
3. Are you watering flowers?
4. I'm picking apples.
5. We're playing football.

【分析】
这道题的核心仿写规则是完全保留原句的句型结构、时态特征，仅用题干括号给出的提示词汇替换原句中对应的同类成分，同时注意主谓一致、动词形式的正确变形即可：
1. 第一题原句是"I'm + 形容词+可数名词单数"的主系表自我介绍结构，用提示词big替换原句的little，leaf替换原句的seed，直接组合即可。
2. 第二题原句是现在进行时的特殊疑问句，结构为"What + be动词 + 主语 + doing"，用提示词Sam替换原句的第二人称主语you，Sam是第三人称单数，对应的be动词要从are改为is，调整后得到正确句子。
3. 第三题原句是现在进行时的一般疑问句，结构为"Are you + 动词ing形式 + 名词"，提示词water要变为现在分词watering，flowers替换原句的a seed，组合即可。
4. 第四题原句是现在进行时的陈述句，结构为"主语 + be动词 + 动词ing形式 + 名词"，提示词I替换原句的They，对应的be动词用am，缩写为I'm，apples替换原句的cotton即可。
5. 第五题原句是现在进行时的陈述句，用提示词We替换原句的He，对应的be动词用are，缩写为We're，提示词play变为现在分词playing，football替换原句的a book即可。
【解析】
我们逐题按照原句结构替换提示元素，保证时态、句式完全匹配：
1. 原句结构：I'm + 形容词 + 名词 → 替换little为big，替换seed为leaf → 得到对应句子。
2. 原句结构：What + be + 主语 + doing → 替换you为Sam，be动词对应三单改为is → 得到对应句子。
3. 原句结构：Are you + 动词ing + 名词 → 替换planting为watering，替换a seed为flowers → 得到对应句子。
4. 原句结构：主语 + be + 动词ing + 名词 → 替换They为I，be动词改为am，缩写为I'm，替换cotton为apples → 得到对应句子。
5. 原句结构：主语 + be + 动词ing + 名词 → 替换He为We，be动词改为are，缩写为We're，替换reading a book为playing football → 得到对应句子。
【答案】
1. I'm a big leaf.
2. What is Sam doing?
3. Are you watering flowers?
4. I'm picking apples.
5. We're playing football.
【知识点】
现在进行时，句型仿写，主谓一致
【点评】
本题是小学英语阶段的基础仿写练习题，核心考察学生对现在进行时不同句式（陈述句、特殊疑问句、一般疑问句）结构的熟悉程度，解题时只需要严格参照原句的框架替换指定提示词，注意不同主语对应的be动词变形、动词现在分词的正确书写即可，整体难度低，适合巩固现在进行时的基础用法。
【难度系数】
0.8

五、阅读短文，选择正确答案。
Bamboo is a very interesting plant. Some people think it is a tree because it is tall and hard, but it is actually a kind of grass!
Bamboo is one of the fastest-growing plants in the world. Some types of bamboo can grow almost one metre in just one day! That means you can almost watch it grow.
Bamboo doesn't grow from seeds very often. It usually grows from its roots under the ground. New bamboo plants, called shoots, come out of the earth and grow very quickly.
Many animals, like pandas, love to eat bamboo. People also use bamboo to make many things, like furniture, chopsticks, and even houses. Bamboo is very useful and important for our life.
( ) 1. What is bamboo?
A. A tall tree. B. A kind of grass. C. A beautiful flower.
( ) 2. How fast can some bamboo grow in a day?
A. About one centimetre. B. About one metre.
C. About ten metres.
( ) 3. How does bamboo usually grow?
A. From its seeds.
B. From its leaves.
C. From its roots under the ground.
( ) 4. What is the name of new bamboo plants that come out of the earth?
A. Seeds. B. Shoots. C. Roots.
( ) 5. Which of the following is NOT true about bamboo?
A. Pandas eat it.
B. People can make things from it.
C. It grows very slowly.

1. B 2. B 3. C 4. B 5. C

【分析】
这是一篇细节类英语阅读理解题，解题思路非常清晰：首先可以先浏览所有题干的问题，带着问题回到短文中逐段定位对应的原文内容，将原文表述和选项逐一比对，排除错误选项就能选出正确答案，不需要复杂的逻辑推理，所有题目的答案都能在原文中直接找到依据。
【解析】
1. 定位原文第一段"Some people think it is a tree because it is tall and hard, but it is actually a kind of grass!"，可知竹子实际上是一种草，排除A（是人们的错误认知）、C（文中完全未提及），选B。
2. 定位原文第二段"Some types of bamboo can grow almost one metre in just one day!"，almost和选项里的about含义一致，可知部分竹子一天可以长大约1米，选B。
3. 定位原文第三段"It usually grows from its roots under the ground."，直接对应选项C的表述，排除A（竹子不常从种子生长）、B（文中未提及），选C。
4. 定位原文第三段"New bamboo plants, called shoots, come out of the earth and grow very quickly."，明确指出从土里长出来的新竹子叫做shoots（笋），选B。
5. 逐一核对选项：A选项对应最后一段"Many animals, like pandas, love to eat bamboo"表述正确；B选项对应最后一段"People also use bamboo to make many things"表述正确；C选项和第二段"Bamboo is one of the fastest-growing plants in the world"完全矛盾，表述错误，本题要求选不正确的选项，因此选C。
【答案】
1. B 2. B 3. C 4. B 5. C
【知识点】
阅读理解细节定位，短文信息匹配，植物主题词汇
【点评】
本题属于低难度的说明类阅读题，所有题目均为细节查找类题型，不需要额外推理，学生只要掌握回文定位的阅读技巧，耐心找到对应原文语句就能轻松选出正确答案，适合用来巩固基础阅读解题方法，同时也能让学生了解关于竹子的基础常识。
【难度系数】
0.9