Ⅱ. Read and write（参观植物园能让我们学到很多关于植物的知识。判断下列句子是否正确？正确的用T表示，错误的用F表示）
() 1. If the four-o’clock flowers close up early in the morning, it is going to be sunny.
() 2. Look! These morning glories are open. I guess it is a rainy day.
() 3. The sunflower has a long, thick stem and big leaves.
() 4. On rainy days, pine cones close to protect their seeds.
() 5. A pine tree has special leaves. They look like lovely umbrellas.

1. T 2. F 3. T 4. T 5. F

【分析】本题为英语阅读理解判断题，需先理解每个句子的含义，结合常见植物的形态、习性等常识逐一判断句子正误，确保答案符合植物相关知识和题目要求。
【解析】1. 四点花（four-o’clock flowers）的开合与天气相关，若清晨早早闭合，预示将是晴天，故句子正确，填T；2. 牵牛花（morning glories）通常在晴天开放，雨天多闭合，句子说开放是雨天，错误，填F；3. 向日葵具有长而粗的茎和大叶片，描述正确，填T；4. 雨天时松果会闭合以保护内部种子，描述正确，填T；5. 松树的叶子是针状，并非像伞，描述错误，填F。
【答案】1.T 2.F 3.T 4.T 5.F
【知识点】植物的特性、英语阅读理解判断、常见植物形态
【点评】本题融合英语阅读与植物常识，既考查英语句子理解能力，又涉及基础植物知识，适合小学阶段拓展练习，难度适中。
【难度系数】0.5

Ⅲ. Read and complete（在参观植物园时，Yaoyao被各种神奇的植物吸引。请根据提示补全短文，把正确的字母代号写在横线上）
A. is covered with B. a special coating (涂层) C. dry D. looks like
E. in a very short time F. the special shape G. catch a lot of sunlight H. are strong
Yaoyao is visiting the botanical garden. First, she sees some bright sunflowers. Look, this kind of sunflower 1. a big round golden plate. It has a thick stem and large leaves. The thick stem supports the whole plant well. The large leaves can 2. to help the plant grow and 3. of the sunflower head makes it easy for bees to stay and collect honey.
Then she sees some ivy (常春藤) on the rock. Look, the whole rock 4. green ivy. The ivy has thin but tough roots. These roots 5. enough to fix the plant on the rock. It can climb and cover the rock 6. . When ivy grows thick, it can protect the rock from strong wind and heavy rain.
At last, she sees some pink water lilies. Their round leaves have 7. that stops water from staying on top. This way, the leaves always stay 8. and clean on the water. Many visitors enjoy taking photos of these lovely water lilies.

1. D 2. G 3. F 4. A 5. H 6. E 7. B 8. C

【分析】
首先通读短文，明确每段描述的植物（向日葵、常春藤、睡莲）的特点，结合句子的主语单复数、语义逻辑，匹配对应的选项。第1空描述向日葵的外形，需选表“看起来像”的短语；第2空讲叶子的功能，选与阳光相关的短语；第3空对应向日葵头的特性，选“特殊形状”；第4空是岩石被常春藤覆盖，用被动短语；第5空描述根的特性，选“牢固的”；第6空讲覆盖岩石的速度，选“很短时间内”；第7空讲睡莲叶子的特殊结构，选“特殊涂层”；第8空对应叶子的状态，选“干燥的”。
【解析】
1. 句意：这种向日葵看起来像一个大的金色圆盘子。主语是单数，动词短语looks like（看起来像）符合语境，故选D。
2. 句意：大叶子能收集很多阳光来帮助植物生长。catch a lot of sunlight（收集很多阳光）符合叶子的功能，故选G。
3. 句意：向日葵头的特殊形状让蜜蜂容易停留采蜜。the special shape（特殊形状）符合语境，故选F。
4. 句意：整个岩石被绿色常春藤覆盖。被动结构is covered with（被……覆盖）符合语义，故选A。
5. 句意：这些根足够牢固来把植物固定在岩石上。are strong（是牢固的）描述根的特性，故选H。
6. 句意：它能在很短时间内攀爬并覆盖岩石。in a very short time（在很短时间内）表时间，符合句意，故选E。
7. 句意：它们的圆叶子有特殊涂层，阻止水停留在表面。a special coating（特殊涂层）符合描述，故选B。
8. 句意：这样叶子在水面上总是保持干燥干净。dry（干燥的）符合语境，故选C。
【答案】
1.D 2.G 3.F 4.A 5.H 6.E 7.B 8.C
【知识点】
动词短语辨析；名词短语辨析；形容词用法
【点评】
本题是语境型补全短文题，围绕植物园的植物展开，考查学生对词汇短语在具体语境中的运用能力，需结合上下文语义和语法知识选选项，难度适中，能有效考查英语基础运用能力。
【难度系数】
0.6

Ⅳ. Read and rewrite（学习了本单元后，你了解了很多植物的知识吧！读一读，按照例句写句子）
e.g. ① The four-o’clock flower closes up early in the morning. I guess it is going to be sunny.
② When grass is dry at morning light, look for rain before the night.
1. The four-o’clock flower opens after 6 a.m. .
2. The morning glories are open. .
3. When pine cones stay closed after sunrise, .

（此题答案仅供参考）
1. I guess it is going to be cloudy or rainy.
2. I guess it is going to be a nice day.
3. the rain is coming/I guess it will rain later
4. the rain will come very soon/I guess it is going to rain soon

【分析】本题要求根据植物的状态推测对应的天气，仿照例句结构（前半句陈述植物情况，后半句推测天气）完成句子。解题思路是：先明确每个小题中植物的状态，再结合植物与天气的对应常识，选择符合例句结构的英语表达填空。
【解析】1. 四点花早上6点后开放，结合植物与天气的常识，对应的天气为多云或雨天，仿照例句用“I guess...”的结构，故填I guess it is going to be cloudy or rainy；2. 牵牛花开放时通常预示好天气，仿照例句结构，故填I guess it is going to be a nice day；3. 松果日出后闭合，预示即将下雨，结合要求填对应的推测表达，故填the rain is coming/I guess it will rain later。
【答案】1. I guess it is going to be cloudy or rainy. 2. I guess it is going to be a nice day. 3. the rain is coming/I guess it will rain later
【知识点】根据语境补全句子、植物与天气的英语表达
【点评】本题结合植物知识与英语句式运用，考查学生的语境理解和语言表达能力，贴近单元学习内容，难度适中。
【难度系数】0.6