4 必修第一册 Unit 4 Looking good, feeling good（配套练习Word版）-【创新教程】2027年高考英语总复习大一轮课时作业（译林版）

课时冲关4　Unit 4　Looking good, feeling good 　学生课时P289

There's a large number of questions and concerns about the appearance of eggs. Any slight cloud, strange white wrinkles, different colored shell, or red spots, and we take pause. In fact, they're all perfectly safe to eat, and don't even substantially change the taste.

One odd occurrence: Seeing a completely white or incredibly light­yellow yolk (蛋黄). Often, it is enough to drive you to Google search or call your mom to double­check if it's OK to consume. The good news is that you don't need to throw away that fried egg from the pan. Coming across a white yolk is perfectly natural, though it's a little rare in the United States.

The color of your egg yolk depends on the feed of the chickens. In the U. S．， chickens typically eat a diet of yellow corn, and the pigments (色素) from the plant make their way into the egg yolks. Those pigments are also what give chicken skin and fat its yellowish color. If the chicken happens to eat more white corn than yellow, the yolk will be paler as well.

If you've traveled overseas, you've probably noticed that the color of yolks varies widely across the globe. Again, this difference comes down to what the chickens are eating. In many African countries, for example, chickens typically have a diet of mostly sorghum, a grain with much less yellow pigmentation than yellow corn, resulting in lighter, or completely white yolks. In South American countries, you will notice pink, blood orange, or almost reddish yolks, because their chicken feed is rich in red seeds.

In the U. S. , many people falsely associate darker yolks with happier hens or higher nutrition. Farmers can easily manipulate the chicken feed to include carrots, alfalfa (苜蓿) powder, or red seeds to determine the color of their chickens' eggs.

1．Why are people so concerned about the appearance of eggs?

A．It affects the prices.

B．It is related to food safety.

C．It is linked with their nutrition.

D．It determines the color of yolk.

2．How do people find a white yolk according to Paragraph 2?

A．Abnormal.　 B．Delicious.

C．Fresh.  D．Natural.

3．What affects the color of the egg yolk most?

A．The food hens eat.

B．The color of the hens.

C．The type of the hens.

D．The freshness of the eggs.

4．Why do farmers add alfalfa powder or red seeds to the feed of chickens?

A．To cut down the farm costs.

B．To make their eggs easily preserved.

C．To promote their eggs' attraction.

D．To improve the health of chickens.

[语篇解读]　这是一篇说明文。文章主要说明了影响鸡蛋外观的因素以及蛋黄的颜色在世界各地差别很大。

1．B　[推理判断题。根据第一段“There's a large number of questions and concerns about the appearance of eggs. Any slight cloud, strange white wrinkles, different colored shell, or red spots, and we take pause.In fact, they're all perfectly safe to eat, and don't even substantially change the taste.(人们对鸡蛋的外观有很多疑问和担忧。任何轻微的阴影，奇怪的白色皱纹，不同颜色的外壳，或红色的斑点，我们都会停下来。事实上，它们吃起来都非常安全，甚至不会显著改变味道。)”可知，人们如此关注鸡蛋的外观是因为与食品安全有关。]

2．解析：A　[推理判断题。根据第二段“One odd occurrence: Seeing a completely white or incredibly light­yellow yolk (蛋黄). Often, it is enough to drive you to Google search or call your mom to double­check if it's OK to consume.(一个奇怪的现象：看到一个完全白色或令人难以置信的淡黄色的蛋黄。通常情况下，这足以驱使你去谷歌搜索或打电话给你妈妈确认是否可以吃。)”可知，碰到白色的蛋黄人们会去谷歌搜索或打电话给妈妈确认是否可以吃，可得出人们认为白色的蛋黄是不正常的。]

3．解析：A　[细节理解题。根据第三段“The color of your egg yolk depends on the feed of the chickens. In the U. S．， chickens typically eat a diet of yellow corn, and the pigments (色素) from the plant make their way into the egg yolks. Those pigments are also what give chicken skin and fat its yellowish color. If the chicken happens to eat more white corn than yellow, the yolk will be paler as well.(蛋黄的颜色取决于鸡的饲料。在美国，鸡通常以黄色玉米为食，玉米中的色素会进入蛋黄。这些色

 

素也是使鸡皮和脂肪呈现黄色的原因。如果鸡肉碰巧吃的白玉米比黄玉米多，蛋黄也会更浅。)”可知，母鸡吃的食物对蛋黄的颜色影响最大。]

4．C　[推理判断题。根据最后一段“In the U. S．， many people falsely associate darker yolks with happier hens or higher nutrition. Farmers can easily manipulate the chicken feed to include carrots, alfalfa (苜蓿) powder, or red seeds to determine the color of their chickens' eggs.(在美国，

许多人错误地将深色蛋黄与更快乐母鸡或更高的营养联系在一起。农民可以很容易地操纵鸡饲料，加入胡萝卜、苜蓿粉或红色种子，以确定他们的鸡蛋的颜色。)”可知，农民要在鸡的饲料中加入苜蓿粉或红籽是为了提高鸡蛋的吸引力，让消费者购买。]

 

 

When we eat some popular kinds of shellfish, we leave behind large amounts of shells.However, these shells are no longer thrown into waste containers.__1__

In the U．S., shells cast aside in restaurants and other businesses are being collected, cleaned and thrown back into waterways.__2__ One of the latest projects on oysters (牡蛎) takes place in Atlantic City, New Jersey.The shells were put into the state's Mullica River and help form new or expanded oyster groups.Free­floating baby oysters connect to the shells and grow on them.

__3__ It has also helped eateries save money on dealing with their shells, according to Scott Stueber, a fisheries biologist with the Department of Environmental Protection.

__4__ In nature, oysters are cleaners.One adult oyster can remove pollutants from about 190 liters of water a day.So oysters can improve water quality.Oyster groups also are being planted along some coastlines to strengthen shores.Besides, oyster reefs can protect shorelines.Such reefs can also be homes for sea creatures and provide food for humans.

Communities, environmental groups and governments around the world have had oyster reefs recycled and replanted in recent years.__5__ For example, each year in Maryland, about 70 cubic meters of recycled shells are turned into oyster groups.Since 2009, the Harte Research Institute at Texas A&M University has collected about 800,000 kilograms of shells and rebuilt about 100,000 square meters of oyster reefs.

A．And most of them end up in waterways.

B．It's happening in many states of the United States.

C．The shells form a new living place for sea creatures.

D．The Mullica River is actually home to some of the oysters.

E．Several projects now aim to put them back into waterways.

F．The project has kept about 60,000 kilograms of shells out of landfills.

G．Despite the economic benefits, the main goal is to improve the environment.

[语篇解读]　本文是说明文。讲述了一种处理吃完贝类留下的贝壳的方法，把贝壳重新扔回水道，不仅有经济效益，而且对环境有益。

1．E　[上文“When we eat some popular kinds of shellfish, we leave behind large amounts of shells.However, these shells are no longer thrown into waste containers.(当我们吃一些受欢迎的