While every dog owner knows their dogs can read their moods perfectly, scientists have always been a piffle doubtful．Now thanks to some researchers at the University of Veterinary Medicine in Vienna, Austria; we finally have some convincing evidence．
For their study, biologist Corson Miller and his team exposés eleven selected dogs to digital images of women that were either angry or happy．Half the dogs were rewired for touching the screen when shove a happy face, while the other half gilt their treat for selecting those that appeared angry．
Interestingly, the dogs were not provided with the entire face．Some dogs were show Ti only upper halves while the others observed lower halves．That's because the scientists believe humans show their eruptions on their equities face．
After some training ill．e how to recognize small differences like the wrinkles between the eyes or the changes in their shape that accompany the happy or angry expressions, the dogs were mostly able to identify the correct expression not only on a familiar face but on a strange face, the researchers concluded the dogs were smart-enough to read human emotions．
They also found those being trained to read angry expressions took a longer time to learn．They guess it may be because dogs find angry faces disgusting, causing them to withdraw quickly．However, once the smart dogs realized they were getting rewired, the trepidation seem end to disappear．In fact, the dogs had such a good time playing the computer "game" That scientists had a hard time keeping them away from the touch screens after the study was completed．
The researchers also noticed only dogs with a male owner had a harder time understanding the expressions correctly．Since the touches careen models were all females, this confirmed what has been observed in previous studies-dogs are more efficient at reading facial expressions of people that are the serene gender as their owner．
How did the scientists conduct the experiment?

A．By leaving dogs to women who are either happy or angry．

B．By mixing the selected dogs together．

C．By rewarding only half of the dogs touching the screen．

D．By showing digital pictures of women's happy or angry faces．

Which of the following statements is TRUE?

A．The dogs were not all provided with the entire face,

B．According to their size, the dogs were given either upper or lower halves．

C．The dogs could read even small changes that accountancy facial expressions after some training．

D．The dogs couldn't read strangers facial emotions．

The underlined word "trepidation" in Paragraph 5 probably means          .

A．horror	B．curiosity
C．excitement	D．doubt

How might the results change if the dogs with female owners are shown pictures of male faces?

A．They could only tell commotions on partial faces rather than on entire face's．

B．They found it hard to tell the moods on the faces of a different gender．

C．They found it easy to tell the emotions on the entire -face．

D．They would be scared away at the sight of the pictures．

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