阅读理解。

      It seems that school children all over the world complain about their school food. Cherie Blair, the

wife of previous Prime Minister Tony Blair, said that she would prepare a packed lunch for her son if

school dinners do not improve. So what do students of your age eat for lunch at school?

     Japan

     High schools have canteens (食堂), which serve everything from noodles to rice, but no hamburger

and chips. Other children bring food from home such as cold rice balls, meat or fish, pickles (泡菜) and

vegetables. Students take home a menu for the coming month containing notes on nutrition (营养) value.

Twice a year parents are invited to have a taste of the food. The class with the fewest leftovers (剩饭) at

the end of the month receives a prize.

     Untied States

     A typical menu from a US school is made up of a hamburger with fried potatoes or roast chicken,

lettuce and pickles, fruit and cookies. School lunches must also provide at least one-third of the daily

dietary allowances (定量) of protein, vitamin A, vitamin C, iron, calcium, and calories.

     Australia

     Meat pies, sausage rolls and hotdogs are all traditional dishes in Australian school shops. But as the

nation pays more attention to children's health, healthier foods have started to find their way onto school

menus. Many schools have used a "traffic light system". The sale of red-labelled foods, including cakes,

chocolate and soft drinks, is served only twice a week. Healthier green-labelled foods such as sushi (寿司), sandwiches, corn and watermelon, however, are available every day. In some schools, students

have a choice of up to 89 foods to choose from, including popcorn and rice.

     South Africa

     Most of South Africa's schools do not serve meals at all. Classes end at 1:30 pm and students get

their own lunches. Many students bring food from home, usually sandwiches.

     Fast food and fried food sell the best among students, which has led to a rise in obesity among

children. But as more people began to realize the fact that being too fat may cause different diseases,

some schools in towns have led the way towards better nutrition. Now students at these schools are

provided with lunches of porridge with vegetables, such as cabbages, onions, beans, carrots and

tomatoes.

1. What does the underlined word "obesity" in the last paragraph probably mean?

A. Nutrition

B. Addiction

C. Food shortage

D. Overweight.

2. We can infer from the passage that ______.

A. a typical menu from a US school consists of enough nutrition.

B. most of the students in South Africa eat their lunch at home.

C. many schools in Australia have traffic lights outside their school.

D. you can have whatever you like in school canteens in Japan.

3. What is the main idea of the passage?

A. Schools should try to satisfy the needs of students.

B. Schools serve different foods from country to country.

C. Schools should supply the students with the best food.

D. School children all over the world dislike their school food.

4. The article is written for ______.

A. parents 

B. schoolmasters

C. nutritionists

D. students of your age