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Everyone's nose is in a different shape. Researchers may know the reason. They say it could be because of the climate. People living in warm, humid(湿润的) areas have wider noses. People in cold, dry places have narrower noses. The nose makes sure the air we breathe is warm enough. It is like a temperature controller.

Researchers looked at the noses of over 2,600 Africans, Asians and Europeans. They checked the width and height of their nose, and the distance between the nostrils(鼻孔). It is difficult to know how the shape of our nose will change in the future.

1.Why do different people have different shapes of noses?

A It could be because of their mouth.

B It could be because of the climate.

C It could be because of their living habits.

D It could be because of their parents.

解析：选B。细节理解题。根据第一段第三句They say it could be because of the climate.可知，故选B。

2.Which person has wider noses?

A The person who lives in cities.

B The person who lives in villages.

C The person who lives in warm, humid places.

D The person who lives in cold, dry places.

解析：选C。细节理解题。根据第一段第四句 People living in warm, humid areas have wider noses.可知，故选C。

3.How many people’s noses did the researchers study?

A 26.

B Over 2,600.

C Less than 260.

D 260.

解析：选B。细节理解题。根据第二段第一句Researchers looked at the noses of over 2,600 Africans, Asians and Europeans.可知，故选B。

4.It is _____to know how our nose will change the shape in the future.

A hard

B funny

C strange

D interesting

解析：选A。细节理解题。第二段最后一句It is difficult to know how our nose will change the shape in the future.中的difficult与hard意思相同，故选A。