Many Chinese people used to______each other with "Have you had your meal?" to show     their friendliness. Recently, a new greeting has become____in many Chinese cities, namely   "Have you____weight?"

Chen Xin, a manager of a media company in Hangzhou, has___ his   friends   after successfully getting __________. "Following instructions from my nutritionist, I went on a __________ and lost 10 kg," Chen said with a____smile.

In recent years, food-delivery services have been growing fast and entering every corner of Chinese cities. Also, Chinese people can________buy foods from all over the world. But people     are   paying more and more   attention to their______. More people are   becoming_______with     various terms, such as "low calories", "sugar cut-off" and "light food".

"I used to eat a lot of unhealthy food, which brought me much________. " Chen said. "Now       my health indicators( 指 标 ) are becoming____, and I can feel that my body is in good___ again."

Chen is not alone. Many Chinese are troubled with "diseases of richness", including obesity and high blood pressure, as the quality of life has greatly______over the past decades. Most   people need to worry about if they have a healthy diet,____if they have enough food.

Throughout history man has had to accept the that all living things must die. But people now live longer than they     ____. Yet, all living things still show the________of aging, which will eventually ______ death.

Aging is not a disease, but as a person passes maturity (成熟期), the cells of the body and the ____ they form do not function as well as they ______ in childhood and teenage years. The body provides less ______ against disease and is more _______to have accident.

A number of related causes may________aging. Some cells of the body have a fairly long life, but they are not     _____when they die. As a person ages,________of brain cells and muscle cells decreases. ______ body cells die and are replaced by new cells. In an aging person the_______cells may not be as workable or as capable ______ growth as those of a young person.

Another ______ in aging may be changes within the cells ______ . Some of the protein chemicals in cells are known ______ with age and become less elastic (有弹性的). This is why the skin of old people wrinkles (皱纹) and     ____. This is also the reason why old people________in height. There may be other more important chemical changes in the cells. Some complex cell chemicals, such as DNA and RNA, store and________information that the cells need. Aging may affect this______and change the information-carrying molecules so that they do not transmit the information as well.

A new study has found evidence of aggressive behavior in children who drink four or more servings of soft drinks.every day._______for the study came from the mothers of 3,000 5-year-olds.

Researchers asked the women to keep a_______of how many servings of soft drinks their children drank over a two-month period. The women were also asked to_______a checklist of their children’s behavior.

Shakira Suglia worked on the study with researchers from the University of Vermont and Harvard University School of Public Health. She says they found that children who drank the most soda were more than two times as likely as those who drank no soda to show_______of aggression.

“For the children who_______four or more soft drinks per day, we see an association between aggressive behaviors, attention problems and withdrawn (孤僻的) behaviors.”

The aggressive behaviors included destroying possessions_______others, taking part in fights and_______attacking people.

Shakira Suglia says the researchers identified the_______after they.considered sociodemographic (社会人口的) factors like the child’s age and sex. They also considered other possible influence,_______whether the boys and girls were eating sweets or taking fruit drinks on a normal day. In addition, the researchers examined parenting styles and other social conditions that might be________in the home.

Doctor Suglia says it’s not________why young children who drink a lot of spda have behavior problems.

“We can’t prove that this is a direct________relationship, having said that, there are a lot of ingredients in soda, a lot of ingredients that have not.been examined in relation to behavior.”

A________often found in soft drinks is caffeine, which helps to make people feel energized.

Doctor Suglia suggests that caffeine could be causing the 5-year-olds to be more aggressive. The research is part of a large study called the Fragile Families and Child Wellbeing Study, which________5,000 poor mothers and their children in 20 American cities.

Earlier studies of young adults have found the highest sugar levels in those who carry weapons and show signs of________social behaviors.