Have you heard the latest buzz（蜂鸣）？Bumblebees have.According to a new study，trends can pass through a bumblebee colony （族群） as bees watch and copy one another's behavior.This means the bees have a culture，which is a set of shared behaviors animals learn from one another.People once thought humans were the only species to develop cultures，but chimpanzees and some birds have also been found to have this ability.
    A research team from the UK set up puzzle boxes that offered a sweet-tasting reward when opened. "Demonstrator"（演示者） bees were taught to open the boxes by pushing a red tab or a blue tab.Some "Observer" （观察者）bees saw the demonstrator bees open the boxes，while other bees were not allowed to watch before trying to open the boxes themselves.
    The group of bees that had watched a demonstrator were able to open the puzzle boxes about 28 times a day，while the other group opened them only once a day.The observer bees almost always used the same method as the demonstrators did.For example，those who watched a bee open a box using the red tab almost always pushed the red tab as well.
    "Some of them would play around with the box and find another way，but they still would return really strongly to the demonstrator's preferred behavior，" Alice Bridges，the lead author of the study，told The Washington Post.She said the bees were developing "a local trend."
    Even when the researchers allowed groups of bees to see both methods，each group soon developed its own trend.A skill was passed along as new bees learned from more experienced bees.After several days，one colony came to prefer the "blue method"，while the other almost always chose the "red method."
    "The fact that bees can watch and learn，and then make a habit of that behavior，adds to the fact that they are far smarter creatures than a lot of people have thought，" said study co-author Lars Chittka.
（1）How does the scientists explain their findings about the bumblebees？

D

D

A．By introducing some rules.
B．By listing a lot of numbers.
C．By mentioning achievements in others' studies.
D．By making comparisons in different experiments.
（2）What does the underlined phrase "a local trend" mean？

C

C

A．A bumble bee colony.
B．The blue method.
C．A set of shared behaviors.
D．The red method.
（3）What can we learn from bumblebees according to the passage？

C

C

A．The observer bees could open the box only once a day.
B．Some bees would play around with the box and fly away.
C．The bees who watched a bee open a box using the red tab may prefer the red method.
D．The bees who watched both methods would use both red and blue tabs to open the box.
（4）What is the most suitable title for the passage？

B

B

A．A Recent Study on Different Bees
B．A Culture among Bumblebees
C．How do Bumblebees Make a Buzz
D．Why Bumblebees Live as a Colony