We all enjoy the delicious dish like potatoes with beef or potato chips．You can find the potatoes in a lot of popular food．

Potatoes are going to become China's fourth staple（ 主食）food after rice，wheat and corn．China is the world's largest producer of potatoes．But only some of them are eaten every year，far below the numbers of the United States and European countries．China is planning to have 100million mu to grow potatoes by 2020，according to the speech of the Ministry of Agriculture on Feb.23，2016．

In the future，Chinese people will be able to eat bread，noodles

and other foods that are made of potatoes．

A Beijing Nevus article pointed out that potatoes could not only make grain supply safer．but also harm the environment less．Potatoes need less water to grow．They can grow well in

dry weather and even grow on poor land．Also，potato flour can be stored for over 15years．but one year for rice and three years for wheat．

Potatoes are called"the second bread"．They have most of the vitamins（ 维生素）people need．"Potatoes are low in fat and calories（卡路里），but they have good protein．These satisfy

the people in a healthy diet，"a food expert said．

Potatoes have long been a staple food in western countries．One delicious potato dish in Ireland is boxy pancake．People in the UK like jacket potatoes．In the United States，French fries are often found in American fast food shops．

56．What is going to become China's fourth staple food？ 　　

A．	Rice．
B．	Wheat．
C．	Po ta toes．
D．	Corn．

57．From the passage we know people in the Us eat more potatoes than those in 　　

A．	Japan
B．	China
C．	Canada
D．	European countries

58．Why are potatoes chosen to become the staple food？ 　

A．	They need much water to grow．
B．	They won't be able to grow on poor land．
C．	They are rich in most of the vitamins people need．
D．	The potato flour can't be stored more than 15years．

59．What does the underlined word"protein"mean？ 　　

A．	脂肪
B．	热量
C．	蛋白质
D．	钙质

60．One delicious potato dish in the UK is 　　

A．	jacket potatoes
B．	French fries
C．	boxy pancake
D．	potatoes with beef．