4. What does the phrase “a big change” in Paragraph 1 mean?
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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.
5. 【新考法·图片理解】Which of the following plants is China's fourth staple food?
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6. Why are potatoes better than other staple foods?
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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.
7. Paragraph 4 mainly tells us that ______.
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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
8. What have scientists tried to do?
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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 staple foods like noodles and flour.

4~8 BCBAD