NEW YORK （Reuters Health）--Two years after New York City declared war on artificial trans fats（人造反式脂肪酸）, nearly all city restaurants had successfully cut the fats from their menus, health officials reported Monday.
In December 2006, the city’s Board of Health decided to launch a gradual trans-fat phase-out （逐步淘汰）from all licensed eating establishments--including restaurants, school cafeterias and street vending spots. Then many cities like Washington, San Francisco and Philadelphia, reflected it actively.
By November 2008, more than 98 percent of city restaurants had stopped using artificial trans fats for cooking, frying and baking, researchers with the city’s health department report in the Annals of Internal Medicine.
Trans fats have become notorious because they not only raise so-called “bad” LDL cholesterol （胆固醇）, as the fats in animal products do, but also lower levels of so-called “good”HDL cholesterol.
While some meats and dairy products naturally contain trans fat, most trans fats in people’s diet are artificial; they are formed when manufacturers add hydrogen to vegetable oil to make it become solid. These so-called partially hydrogenated oils were main products in foods, like crackers, cookies and pastries, and widely used by restaurants in cooking, frying and baking.
When the restriction was first adopted, the researchers note, some critics claimed it was an Orwellian measure, while others worried that restaurants would have a tough time finding suitable trans-fat replacements.                                                     
However, the transition has been smooth, Angell’s team writes, declaring that trans-fat restriction “is now a largely unnoticed part of New York City life.”
Ridding the food supply of trans fats, the researchers write, could potentially improve the cholesterol levels of millions of people.
1. In which city the local health department first decide to stop artificial trans fats?
A. Washington.    B. San Francisco.     C. Philadelphia.      D. New York.
2. We can learn from the third paragraph that ________.
A. in the city most people still use artificial trans fats
B. only a few restaurants still use trans fats and the decision win most people’s support
C. the city’s decision proves to be useless
D. many people think using artificial trans fats is not so bad
3. The underlined word “notorious” in the fourth paragraph means ________.
A. having a very bad reputation          B. having a very good reputation
C. nutritious                         D. delicious
4. What is the main idea of the passage?
A. New York restaurants are nearly all trans-fat-free （无……有）
B. None of the restaurants in the U.S can use trans fats.
C. Most of the restaurants still use trans fats once in a while.
D. Trans fats are bad for health.