Why are dogs our best friends．Maybe because they can understand our words much better than we thought，according to a study in Hungary．It found that dogs understand not only what we say，but also how we say it．

"The results were very exciting and very surprising．"Said the researcher Attila Andies，from Eotvos Lorand University in Budapest．

For the study，the researchers first trained 13 dogs for months．The dogs had to sit quietly inside machine，so that the researchers could check their activity．

Then the researcher put headphones on dogs and played people's voice to them．There were four different voice．Some were positive words，such as"well down"，or neutral（不带感情色彩的） words like"however"．The words were also in different tones（音调）．Some were positive and some were neutral．

Brain scans（扫描）showed that the dogs could recognize（辨认）words．as well as the tone of words，much like people do．The positive words with a positive tone brought the stronger activity in their brain's reward centers（反应中枢）．

"It shows that for dogs，a nice phrase can word very well as a prize，but it words best if both words and tones match．"Said Andies．

They also found that dogs deal with meaningful words with the left side of the brain and tones with the right．Human brains work in the same way．

It gave us a new understanding of language，said Andies．That is，not only do humans understand the meaning in words，other species（物种） do too．

根据短文内容，选择最佳选项，并在答题卡上将选定的答案字母标号涂黑．

36．What was found according to the study in Hungary？ 　　

A．	Dogs can't understand people words．
B．	Dogs can only understand what we say．
C．	Dogs can understand what we thought better than our words．
D．	Dogs understand not only what we say，but also how we say it．

37．Which of the following is NOT mentioned in the study？ 　　

A．	Researchers played with the dogs．
B．	Researchers made dogs sit inside machine．
C．	Researchers scanned the dogs'brain．
D．	Researchers played people's voice to the dogs．

38．Dogs think 　　as a best prize．

A．	neutral words with a neutral tone．
B．	neutral words with a positive tone．
C．	positive words with neutral tone
D．	positive words with positive tone

39．According to the passage，which of the following is TRUE？ 　　

A．	Human brains don't work in the same way as dogs do．
B．	Dogs deal with meaningful words with the left side of the brain．
C．	The researchers trained dogs for years to check their brain activity．
D．	Researcher Attila Andies was disappointed at the result of the study．

40．What is the main idea of the passage？ 　　

A．	Dogs are as clever as humans．
B．	Dogs are good at learning human's language．
C．	Dogs can understand the meaning in words．
D．	Dogs can do what human do．