题目内容：

Baby girls make their way to dolls as son as they can crawl(爬), and boys will head for the toy cars, a study has shown. The findings-the first t o show consistent differences in very young babies-suggest there is a biological basis for their preferences.

Psychologists Dr Brenda Todd carried out an experiment involving 90 babies aged 9 months to 36 months. They were allowed to choose from 7 toys. Some were boys’ toys-a car, a digger, a ball and a blue teddy. The rest were girls’ toys; a pink teddy, a doll and a cooking set. They were placed a meter away from the toys, and could pick whichever toy they liked. Their choice and amount of time they spent playing with each toy were recorded.

Of the youngest children (9 to 14 months), girls spent much longer time playing with the doll  than boys, and boys spent much more time with the car and the ball than the girls did. Among the two and three-year-olds, girls spent 50 percent of the time playing with the doll while only two boys briefly touched it. The boys spent almost 90 percent of their time playing with cars, which the girls barely touched. There was no link between the parents’ views on which toys were more appropriate for boys or girls, and the children’s choices.

Dr Brenda Todd said, “Children of this age are already exposed to much socialization. Boys may be given ‘toys that go’ while girls get toys they can care for, which may help shape their preferences. But these findings are consistent with the former idea that children show intrinsic(内在的) interest in particular kinds of toys. There could be a biological basis for their choices. Males through evolution have been adapted to moving objects, probably through hunting instincts (本能), while girls prefer warmer colors such as pink, the color of a newborn baby.”

1.Baby boys and girls have different toy preferences probably because      .

A. baby boys are much more active

B. baby girls like bright colors better

C. their parents treat them differently

D. there is a biological difference between them

2.What can we infer from Paragraph 3?

A. Nine-month-old baby boys don’t play with dolls at all.

B. Two-year-old baby girls sometimes play with cars and balls

C. The older the babies are, the more obvious their preference is.

D. Parents should teach baby boys and girls to share each other’s toys.

3.What conclusion did Dr Brenda Todd draw from the results of the study?

A. Adults purposely influence the preference of babies.

B. Babies’ preference isn’t affected by social surroundings.(环境)

C. Baby boys preferring moving toys will be good at hunting.

D. Baby girls preferring warmer colors will be warmhearted.

4.Which column of a newspaper does the passage probably appear in?

A. Science.  B. Health.

C. Education.  D. Entertainment.