阅读理解

     Age plays a major part in people who are infected with cold, ie, in people who suffer from cold

infection.A study done by University of Michigan, has shown information that seems to be true for

the general population.Babies are the most cold infected group, generally more than six colds in their

first year.Boys have more colds than girls up to the age of three.After three, girls are easier to get

infected with cold than boys, and teenage girls get three colds a year to boys' two.The general cold

infections continue to get less into adults.Elderly people who are in good health have as few as one

or two colds every year.One interesting thing is found among people in their twenties, especially

women, who show a rise in cold infection, because people in this age group are most likely to have

young children.

      The study has also found that economy plays an important role as well.With more and more

income, the frequency at which colds are reported in the family is getting lower and lower.Families

with the lowest income usually sufferabout a third ally forces people to live in rooms more crowded

than rooms owned by richer people, and the crowding usually leads to more chances for the cold

virus to travel from person to person.Low income may also have an effect on our diet.Many scientists

believe that a poorer diet usually leads into more possibilities of cold infection.

1. Which of the age groups has the highest frequency of cold infection?

A. Small babies.  

B. Teenage boys.

C. Adult women. 

D. Elderly people.

2. The purpose of writing this passage is to________.

A. give the readers some tips to avoid cold infection

B. show a carefullmade study on cold infection

C. report the major reasons leading to cold infection

D. describe all the possible dangers of cold infection

3. How does economy play an important role in cold infection?

A. Families with lower income suffer less from cold infection.

B. People who have lower income enjoy living in crowded rooms.

C. Rich families can have better nutrition and never get infected.

D. People with higher income have fewer chances of infection.

4. From the passage we can infer that________.

A. age is the only important factor that connects with colds

B. families with the highest income will more easily get infected

C. people have lower frequency of infection as they grow older

D. a better diet may help people to fight against cold infection