《2025年经纶学霸阅读英语100篇五年级英语》

Friday 短文填空
Friday 短文填空
墨西哥湾的赤潮
The Gulf of Mexico is a body of water between Florida and Central America. The weather there is always warm and it is a good vacation spot. But 1. sometimes (sometime) a red tide will break the fun.
A red tide makes the water turn red. This can last 2. for a couple of hours or several months. The red tide is 3. caused (cause) by a kind of microorganism. When the water temperature and sunlight are just right, the microorganism grows at a rapid rate. 4. Millions (million) of the microorganism collect to make a red tide. The red tide hurts the eyes, noses, and throats of swimmers.
Red tide is also 5. harmful (harm) for fish and other salt water animals. When sea animals eat the red tide, they will die. Some shellfish may eat the red tide and continue 6. to live (live). But the microorganism can stay in their bodies, which 7. makes (make) it unsafe for people and other animals to eat them. Most people do not spend much time on the beach during red tide. This is because of the health risks and the smell of 8. dead (die) fish. However, people who like to look for shells find it a good time to collect 9. them (they). The red tide kills the animals inside the sea shells and the shells wash up on the beaches.
Some 10. scientists (science) in western Florida are studying the red tides. They hope to learn more about them and understand why they happen. Then they will be able to warn people when the water is not safe.
一、阅读短文，在空白处填入一个恰当的单词或括号内所给单词的正确形式。
二、新考法 开放问答 根据短文内容，回答下列问题。
1. Why do red tides make the water unsafe for swimmers?
Because red tides can hurt the eyes, noses, and throats of swimmers.
2. What happens to sea animals that eat the red tide?
They will die.
3. In China, we have algal blooms(蓝藻) in lakes. How are they similar to red tides?

They are both caused by the rapid growth of microorganisms when the water temperature and sunlight are just right. They can harm living things in the water.
词汇积累
语法充电
between...and... 用于表示在两者之间。
grow at a rapid rate 表示以很快的速度生长。
make it + 形容词 + for sb to do sth 表示使某人做某事怎么样。
定语从句: 在小学英语中不作为重点讲解, 拓展内容见答案详解。

答案： 一、1. sometimes 句意：但是有时候赤潮会破坏这种乐趣。根据单词提示，这里表示有时候会发生赤潮这种情况。sometime 意为“某个时候”，sometimes 意为“有时”，符合语境，故填sometimes。
2. for 句意：这种情况可能持续几个小时或者几个月。此处表示持续的时间长度，“for+一段时间”表示动作持续的时间，故填for。
3. caused 句意：赤潮是由一种微生物引起的。根据“The red tide is ... (cause) by a kind of microorganism.”可知，句子主语“The red tide”和“cause”之间是被动关系，被动语态的结构是“be+过去分词”，cause 的过去分词是caused，故填caused。
4. Millions 句意：数以百万计的微生物聚集在一起形成了赤潮。这里表示数量众多的微生物，millions of是固定短语，意为“数以百万计的”，句首单词首字母需大写，故填Millions。
5. harmful 句意：赤潮对鱼类和其他咸水动物也有害。be harmful for是固定短语，意为“对……有害”，故填harmful。
6. to live 句意：一些贝类可能会食用赤潮生物并继续存活。continue to do sth意为“继续做某事”，故填to live。
7. makes 句意：但是这种微生物会留在它们的体内，这使得人们和其他动物食用它们时变得不安全。根据“But the microorganism can stay in their bodies, which ... (make) it unsafe for people and other animals to eat them.”可知，which引导的是非限制性定语从句，先行词是前面整个句子，从句时态为一般现在时，谓语动词用第三人称单数形式，make的第三人称单数形式是makes，故填makes。
A 知识拓展 定语从句
定语从句是英语中的一种从句结构，用来修饰句子中的某个名词或代词(称为先行词)，起到定语的作用。它通常由关系代词(who，whom，whose，which，that)或关系副词(when，where，why)引导，这些词连接主句和从句，并且在从句中充当一定的成分。
定语从句的结构：
先行词：是被定语从句修饰的名词或代词，可以是人或物。例如：“The book that is on the table is mine.”(在桌子上的那本书是我的。)中，“book”是先行词。
关系词：引导定语从句，并且在从句中充当主语、宾语、定语或状语等成分。常见的关系代词包括who(指人，作主语或宾语)、whom(指人，作宾语)、whose(指人或物，作定语)、which(指物，作主语或宾语)、that(指人或物，作主语或宾语)。关系副词有when(指时间，作状语)、where(指地点，作状语)、why(指原因，作状语)。
定语从句的分类：
限制性定语从句：这种定语从句对先行词起限定作用，用于修饰某个特定的先行词，如果去掉，句子的意思会变得不完整或不明确。
非限制性定语从句：这种定语从句是对先行词的补充说明，用于增加额外的信息，即使去掉也不会影响句子的主要意思。
8. dead 句意：这是因为健康风险以及死鱼的气味。根据“This is because of the health risks and the smell of ... (die) fish.”可知，这里需要一个形容词来修饰名词“fish”，die是动词“死亡”，其形容词形式是dead“死的”，故填dead。
9. them 句意：然而，喜欢寻找贝壳的人发现这是收集它们的好时机。collect是动词，后面接宾格代词作宾语，they的宾格形式是them，故填them。
10. scientists 句意：佛罗里达州西部的一些科学家正在研究赤潮。根据“Some ... (science) in western Florida are studying the red tides.”可知，这里表示一些人在研究赤潮，science是名词“科学”，scientist是名词“科学家”，some后接可数名词复数形式，故填scientists。
二、1. Because red tides can hurt the eyes, noses, and throats of swimmers. 根据短文中的句子“The red tide hurts the eyes, noses, and throats of swimmers.”可知，赤潮使海水对游泳者不安全的原因是它会伤害游泳者的眼睛、鼻子和喉咙。
2. They will die. 根据短文中的句子“When sea animals eat the red tide, they will die.”可知，当海洋动物食用赤潮中的微生物时，它们会死亡。
3. They are both caused by the rapid growth of microorganisms when the water temperature and sunlight are just right. They can harm living things in the water. 根据短文内容，赤潮是由一种微生物引起的，当水温和阳光条件适宜时，这种微生物会迅速繁殖，形成赤潮，并且赤潮对海洋生物有害。在中国湖泊中出现的蓝藻现象也是由于类似的原因，即水温、阳光等条件适宜时，蓝藻大量繁殖。两者都对水中的生物造成危害。