题目内容：

    A new study has found evidence of aggressive behaviour in children who drink four or more cups of soft drinks per day. The information for the study came from the mothers of 3,000 five-year-olds.

Researchers asked the mothers to keep a record of how many glasses of soft drinks their children drank over a two-month period. The mothers were also asked to complete a list of their children’s behaviour. The researchers found that 43 percent of the youngsters drank at least one glass of sodas every day, and four percent of the youngsters had four or more sodas to drink every day.

Shakira Suglia worked on the study with researchers from the University of Vermont and Harvard University School of Public Health. She says they have found that children who drank the most sodas were more than twice as likely as those who drank no soda to show signs of aggression. “For the children who drank four or more soft drinks per day, we see a connection between aggressive behaviour, attention problems and withdrawn（沉默寡言的）behaviour.”

The aggressive behaviour includes destroying things belonging to others and physically attacking（攻击）people.

Doctor Suglia says it is not clear why young children who drink a lot of sodas have behaviour problems. “We can’t prove that this is a direct cause and effect relationship. There are a lot of ingredients（成分）in sodas, a lot of ingredients that have not been examined in relation to behaviour.”

Caffeine is often found in soft drinks, which helps to make people feel energetic. Doctor Suglia says that caffeine could be causing the five-year-olds to be more aggressive. Earlier studies of young adults have found the highest sugar levels in those who carry weapons and show signs of bad social behaviour.

1.If a teenager drinks a lot of soft drinks, what will he/she be like?

①Find it hard to tell right from wrong.

②Stay alone and speak little.

③Have reading difficulties.

④Have difficulty in concentrating.

A.①③ B.②④

C.③④ D.①②

2.What is aggressive behaviour according to the passage?

A.Protecting oneself from being hit. B.Behaving more confidently.

C.Doing harm to others. D.Saying impolite words to other.

3.What have the researchers found?

A.A lot of ingredients in soft drinks can make people feel energetic.

B.Caffeine may lead to children’s behaviour problems.

C.Having a lot of soft drinks may be bad for the memory.

D.Soft drinks are not good for the health.

4.What is the best title for the passage?

A.Children Who Are Active Show More Bad Behaviour

B.The Relationship between Caffeine and Health

C.How to Keep Children Away from Soft Drinks

D.Children Who Drink Lots of Soft Drinks Are More Likely to Be Aggressive