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Scientists have cast new light on why some men have deeper voices than others. It was traditionally thought that males developed a lower pitched voice to attract members of the opposite sex. However, anthropologists(人类学家) at the American college Penn State believe a deep voice was to scare off other males. Researcher David Puts said, "In humans, and possibly other primates too, a low pitched voice evolved primarily to intimidate(恐吓) other men to make males seem bigger and scarier." He added that, "Human male traits imply physical aggression and formidability and seem to provide competitive advantages in fighting or threatening other men more than they help attract women."

The researchers at Penn State recorded more than 500 men and women speaking. They then played the recordings back to more than 1,100 different people of both sexes. Male volunteers rated each male recording for levels of dominance they perceived in the voices. The same recordings were rated by 15 female volunteers for romantic attractiveness. Men similarly rated the women's voices for attractiveness. Most of the men thought the lower-pitched male recordings belonged to a more dominant man. Dr Puts said women also liked lower-pitched voices, but the pattern of the women's ratings did not lead him to say that the deepness of the male voice was so important to females.

1.What did people always think deeper voices in men attracted?

A Old men.

B Young men.

C Boys.

D Members of the opposite sex.

解析：选D。细节理解题。根据第一段第二句It was traditionally thought that males developed a lower pitched voice to attract members of the opposite sex.可知，故选 D。

2.What kind of advantage did Dr Puts say a deeper voice will give men?

A A big one.

B A competitive one.

C A slight one.

D A narrow one.

解析：选B。细节理解题。根据第一段最后一句Human male traits imply physical aggression and formidability and seem to provide competitive advantages in fighting or threatening other men more than they help attract women.可知，故选B。

3.How many men and women did the researchers record?

A Less than 1,100.

B Around 1,100.

C 1,100.

D Over 1,100.

解析：选D。细节理解题。根据第二段第二句They then played the recordings back to more than 1,100 different people of both sexes.故选D。

4.What did Dr Puts suggest was not so important for females?

A Ratings.

B A deep male voice.

C Aggression.

D A loud voice.

解析：选B。细节理解题。根据第二段第二最后一句Dr Puts said women also liked lower-pitched voices, but the pattern of the women's ratings did not lead him to say that the deepness of the male voice was so important to females.故选B。

5.The passage is about _______.

A deeper voice of men

B advantages of men

C Men and women

D advantages of women

解析：选A。主旨大意题。本文主要讲男性低沉的声音，故选A。