For decades，childhood obesity rates have been on the rise.Now some US cities，including Philadelphia，New York City and Los Angeles，are seeing progress in their fight against obesity.Dropping childhood obesity rates have also been reported in parts of Mississippi，the state with the highest obesity rate in the nation.
The first drops in the number of overweight children came in a September report by the Robert Wood Johnson Foundation.The foundation works to improve health for Americans.New York City showed a 5.5% drop in the number of overweight children from 2007 to 2011.Philadelphia showed a 4.7% drop，and Los Angeles a 3% drop.
From 1980 to 2000，the percentage of obese US kids aged 6 to 19 tripled.About 9 million children were much too overweight.Being overweight can lead to serious health problems，including heart disease，stroke，diabetes，cancer and high blood pressure.Type 2 diabetes，once considered an adult disease，has increased greatly in young people.
In 2011，the Center for Disease Control and Prevention(CDC) began a project to fight childhood obesity.The project's goal is to find ways to make healthy changes in a community's schools，food stores，parks and other places.The cities and states with dropping childhood obesity rates have followed the CDC's suggestions.Philadelphia works with an organization called the Food Trust to connect schools with local farms and bring fresh vegetables to cafeterias.New York City has required chain restaurants to post calorie information on their menus.Mississippi created a program called “Fruits & Veggies：More Matters” to teach kids how to add healthy foods to their daily diets.
Schools nationwide are doing their part.Fried food has disappeared from many cafeteria menus.Wholewheat bread has replaced white bread.Drinks like water and lowfat milk have replaced sugary beverages，including fruit punch，sports drinks and soda.Many schools have banned junk food and require healthier snack options in vending machines.
1．We know that in the state Mississippi ____________．
A．progress in the fight against obesity is not seen
B．people don't care about their obesity problem
C．the obesity rate is lower than other states
D．childhood obesity rates have fallen
2．It is implied in paragraph 3 that ____________．
A．type 2 diabetes is mainly caused by obesity
B．obesity didn't become a problem until recent years
C．being overweight is very harmful to people's health
D．young people are more likely to have type 2 diabetes
3．What did New York City do to help people lose weight?
A．It required people to follow CDC's health suggestions.
B．It told kids how to add healthy foods to their daily diets.
C．It helped people know calorie information on the food they ate.
D．It asked local farms to bring fresh vegetables to school cafeterias.
4．After reading the passage，we learn that American schools ____________．
A．don't think bread is healthy for children
B．don't allow children to eat outside school
C．have driven all vending machines out of school
D．play an important role in helping children fight obesity