Potatoes are becoming China's fourth staple food(主食)after rice，wheat and corn.Using potatoes as a staple can make our diets healthier and more balanced(均衡的)．They are good for us in many ways.

Potatoes are nutritious(有營養(yǎng)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 percent 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. China is facing water shortage(不足)problems，so potatoes are a good choice.

Many Chinese people think potatoes are like vegetables. They cook potatoes along with other ingredients(原料)．But as a staple, potatoes can be cooked differently. Scientists have found ways to make potato flour，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.Potatoes play a small role on the dinner table.B.Potatoes will be eaten more often.

C.People will stop eating potatoes.D.There will be many new kinds of potatoes.

【2】Which of the following plants is China's fourth staple food?

A.B.C.D.

【3】Why are potatoes better than other staple foods?

A.Because they are low in vitamin C.

B.Because they do not have very many calories.

C.Because they are heavier than other staple foods.

D.Because they can make people feel full more easily.

【4】Paragraph 4 mainly tells us that ______.

A.potatoes can be grown all over the countryB.potatoes do not need much water

C.China doesn't have much waterD.potatoes are easy to grow

【5】What have scientists tried to do?

A.Make potatoes taste like real vegetables.B.Use potatoes to cook new dishes.

C.Use potatoes to create staples like noodles and flour.D.Cook potatoes along with rice and wheat.

--- ______ you told me you would. What’s the matter?

A. So B. Or C. Because D. But

-Yes, it really is. I have never heard _______ harder one.

A. the; 不填 B. 不填; the

C. the; the D. a; a

A. 不填, 不填 B. The, an

C. The, 不填 D. 不填, an

A. the； a B. a; /

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C. 不填，不填 D. a, 不填

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A. WhereB. How C. WhatD. When

A. the, the B. the, a C. the, 不填 D. a, the

I have studied for over five hours．

I have studied for________ ________five hours．

【題目】

There is a tiger and a monkey. They are friends. But one day they want to know who is stronger. One of them says, "The one who can get apples over there is stronger. "There is a river over there. The monkey says, "I can't swim. "The tiger says, "I can swim. Please sit on my back. "They go across（穿過）the river. The apple trees are very tall. The tiger can't reach（夠著）the apples. The monkey climbs up the tree and gets many apples. Now they know they should help each other.

【1】The tiger and the monkey want to know .

A.who is smarterB.who is taller

C.who can swimD.who is stronger

【2】 can't swim.

A.The tigerB.The monkey

C.The big animalsD.The small animals

【3】 can't reach the apples.

A.The tigerB.The monkey

C.The tall animalsD.The short animals

【4】At last the monkey goes across the river with the help of .

A.the tigerB.another monkey

C.an animalD.a boat

【5】From the story we know that we should .

A.learn from the tigerB.learn from the monkey

C.help each otherD.All of the above