题目内容：

A while ago, people used to believe that only humans can use tools — but Jane Goodall showed that humans aren’t the only ones to do so. We’ve since found several species that build and use their own tools. Then, many thought that it’s our cultural and family ties that separate us from the animals. Actually, that’s not true either. Several other species, including whales, have shown important cultural behaviors.

Researchers have found that related whales returned to the same locations year after year, and decade after decade, passing the information from one generation to the next. Researchers analyzed the structure of the beluga whale society, finding that migratory culture is inherited（继承）. Furthermore, this cultural inheritance maintains the family ties of beluga whales. This cultural legacy（遗传）is so powerful that some travel as far as 6,000 kilometers each year.

“What interested us most was whether particular whales returned to where they were born or grew up and if this was an inherited behavior,” said Greg O’ Corry-Crowe, Ph.D., lead author and a research professor at FAU’s Harbor Branch. “The only way that we could definitively answer these questions was to find and track close relatives from one year to the next and one decade to the next.”

Researchers also found that beluga whales exhibit an impressively broad range of vocal repertoires and acoustic systems（复杂的声音体系）which suggests that they form complex interpersonal relationships. They like to hang out in the thousands near shore during the summer when the ice melts. Eventually, researchers hope that this will not only enable us to better understand these surprisingly complex species but also develop better ways to protect them in the face of a changing environment — the polar regions, where the beluga whales live, are extremely exposed to climate change.

“Findings from our study are expanding our understanding of how complicated non- primate（非灵长类）societies can be and how important culture is for the survival of these species,” said O’ Corry-Crowe. “Our findings also will influence our thinking in terms of how populations and species are going to adapt to dramatic environmental changes. There are few places where this is more urgent than in the rapidly changing polar regions.”

1.According to the passage, whales usually         .

A. produce their tools    B. use their own tools

C. live near the coast    D. have their cultural ties

2.It can be inferred that migratory culture has         .

A. a short and insignificant effect on beluga whales

B. inherited from the structure of beluga whale society

C. a long and far-reaching effect on beluga whales

D. attracted beluga whales to several fixed locations

3.What’s the purpose of the research?

A. To find beluga whales’ behaviors.

B. To find beluga whales’ acoustic systems.

C. To find beluga whales’ interpersonal relationships.

D. To better understand and protect beluga whales.

4.Why does O’ Corry-Crowe consider it urgent to understand beluga whales’ adaption to their surroundings?

A. Because of the very sophisticated non-primate societies.

B. Because of the rapid environmental changes in polar regions.

C. Because of the misunderstanding of beluga whales’ migrations.

D. Because of the too far distance for beluga whales to migrate.