阅读理解。
Do potatoes play a small role on your dinner table? If so, get ready for a big change!
Potatoes are becoming the fourth staple grain(主粮) after rice, wheat(小麦) and corn in some places. Using potatoes as a staple can make our diets healthier and more balanced. They are good for us in many ways.
Potatoes are nutritious(有营养的). They are rich in vitamin C. A potato's vitamin C is as rich as 10 apples. Potatoes are also low in calories(卡路里)—they have just 75 per cent of the amount of calories that wheat and corn have.
Also, potatoes are easy to grow. People can grow them in almost every part of China. Potatoes don't need much water to grow. Some places of our country are facing water shortage(不足) problems, so potatoes are a good choice.
Many Chinese people think potatoes are vegetables. They cook potatoes along with other ingredients(材料). But as a staple, potatoes can be cooked differently. Scientists have found ways to make potato flour(粉), noodles and other staple foods, just like how we use rice or wheat.
()1. What does the phrase "a big change" in Paragraph 1 mean?
A. People will stop eating potatoes.
B. People should eat potatoes more often.
C. There will be many new kinds of potatoes.
D. Potatoes play a small role on the dinner table.
()2. Which of the following is China's fourth staple grain?

()3. Which of the following is the advantage of potatoes?
A. Potatoes are low in vitamin C.
B. Potatoes don't have many calories.
C. Potatoes are heavier than other staple foods.
D. Potatoes can make people feel full more easily.
()4. Paragraph 4 mainly tells us that .
A. it's easy to grow potatoes
B. China doesn't have much water
C. potatoes do not need much water
D. potatoes can be grown all over the country
()5. What have scientists tried to do?
A. Use potatoes to cook new dishes.
B. Make potatoes taste like real vegetables.
C. Cook potatoes along with rice and wheat.
D. Use potatoes to make staples like noodles and flour.

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

【分析】
本题为英语阅读理解题，需结合原文内容逐一分析各题：第1题通过定位第一段及后文土豆成为第四主粮的信息，推测"a big change"的含义；第2题根据原文第四主粮的描述匹配对应图片；第3题查找原文中土豆的优势细节；第4题分析第四段的中心句；第5题定位科学家的相关做法。
【解析】
1. 定位第一段："Do potatoes play a small role on your dinner table? If so, get ready for a big change!"结合后文土豆成为第四主粮的内容，可知"a big change"指人们应更多食用土豆，选B。
2. 原文第二段明确"Potatoes are becoming the fourth staple grain after rice, wheat and corn"，选项中C为土豆，故选C。
3. 第三段提到"Potatoes are also low in calories"，对应B选项；A与原文"rich in vitamin C"矛盾，C、D未提及，选B。
4. 第四段首句"Also, potatoes are easy to grow"是段落主旨，对应A选项；B、C、D为支撑细节，非主旨，选A。
5. 最后一段"Scientists have found ways to make potato flour, noodles and other staple foods"对应D选项；A、B、C与原文不符，选D。
【答案】
1.B 2.C 3.B 4.A 5.D
【知识点】
阅读理解、细节理解、词义猜测
【点评】
本题围绕土豆成为中国第四主粮展开，考查学生对文章细节、词义及段落主旨的理解，题型常规，难度适中。
【难度系数】
0.6