Taiwan police cannot decide whether to treat it as an extremely clever act of stealing or an even cleverer cheat. Either way, it could be the perfect crime, because the criminals are birds homing pigeons!
The crime begins with a telephone message to the owner of a stolen car: if you want the car back, pay up. Then, the ear owner is directed to a park, told where to find a bird cage and how to attach money to the neck of the pigeon inside. Carrying the money in a tiny bag, the pigeon flies off.
There have been at least four such pigeon pick ups in Changwa. What at first seemed like the work of a clever stay at home car thief, however, may in fact be the work of an even lazier and more inventive criminal mind—one that avoids not only collecting money but going out to steal the car in the first place. Police officer Chen says that the criminal probably has pulled a double trick: he gets money for things he cannot possibly return. Instead of stealing cars, he lets someone else do it and then waits for the car owner to place an ad in the newspaper asking for help.
The theory is supported by the fact that, so far, none of the stolen cars have been returned. Also, the amount of money demanded—under 3,000 Taiwanese dollars—seems too little for a car worth many times more.
Demands for pigeon delivered money stopped as soon as the press reported the story. And even if they start again, Chen holds little hope of catching the criminal. "We have more important things to do", he said.
The writer mentions the fact that "none of the stolen cars have been returned" to show ______.

A:how easily people get fooled by criminals B:what Chen thinks might be correct C:the thief is extremely clever D:the money paid is too little

The crowd stirred and whispered in awe as, on the stage, the horse slowly tapped out the beat. Everyone became tense and quiet as the number of taps neared the correct answer to the horse trainer’s question. After the final tap, the horse paused, seemed to look around and stopped. The crowd went wild!
The horse’s name was Clever Hans, the Educated Horse, and was featured in a vaudeville (杂耍) act in the early 1900s, in Europe. When asked a complicated mathematical question by his owner, Clever Hans would tap out the correct answer with his hooves. For example, if the answer was sixty-eight, Hans would tap out six with his left hoof and eight with his right hoof. Even more remarkable, the owner would leave the room after asking the question, so there could be no secret signal between owner and horse. A mere animal seemed to be accomplishing a highly technical skill of man’s!
It wasn’t until years later that the secret of the trick was revealed. The owner had trained Clever Hans to respond to slight signals. The horse became so sensitive that he learned when to stop from the crowd’s reaction. Members of the audience would start involuntarily, or give some unconscious signal, when Hans reached the right answer. Modern scientists now warn against the Clever Hans syndrome (综合征), whereby researchers unconsciously give clues to their animal subjects about the actions they like to see performed!

A:animal intelligence B:mathematical skills C:Clever Hans D:unconscious behavior

It was clever ______ at the answer in two minutes.

A:of him to arrive B:for him to arrive C:for his arriving D:of his arriving

The crowd stirred and whispered in awe as, on the stage, the horse slowly tapped out the beat. Everyone became tense and quiet as the number of taps neared the correct answer to the horse trainer’s question. After The final tap, the horse paused, seemed to look around and stopped. The crowd went wild !
The horse’s name was Clever Hans, the Educated Horse, and was featured in a vaudeville(杂耍) act in the early 1900s, in Europe. When asked a complicated mathematical question by his owner, Clever Hans would tap out the correct answer with his hooves. For example, if the answer was sixty- eight, Hans would tap out six with his left hoof and eight with his right hoof. Even mere remarkable, the owner would leave the room after asking the question, so there could be no secret signal between owner and horse. A mere animal seemed to be accomplishing a highly technical skill of man’s !
It wasn’t until years later that the secret of the trick was revealed. The owner had trained Clever Hans to respond to slight signals. The horse became so sensitive that he learned when to stop from the crowd’s reaction. Members of the audience would start involuntarily, or give some unconscious signal, when Hans reached the right answer. Modern scientists now warn against the Clever Hans syndrome (综合征), whereby researchers unconsciously give clues to their animal subjects about the actions they like to see performed!
This passage is mainly about ______.

A:animal intelligence B:mathematical skills C:Clever Hans D:unconscious behavior

It was clever ______ at the answer in two minutes.

A:of him to arrive B:for him to arrive C:for his arriving D:of his arriving

The crowd stirred and whispered in awe as, on the stage, the horse slowly tapped out the beat. Everyone became tense and quiet as the number of taps neared the correct answer to the horse trainer’s question. After The final tap, the horse paused, seemed to look around and stopped. The crowd went wild !
The horse’s name was Clever Hans, the Educated Horse, and was featured in a vaudeville(杂耍) act in the early 1900s, in Europe. When asked a complicated mathematical question by his owner, Clever Hans would tap out the correct answer with his hooves. For example, if the answer was sixty- eight, Hans would tap out six with his left hoof and eight with his right hoof. Even mere remarkable, the owner would leave the room after asking the question, so there could be no secret signal between owner and horse. A mere animal seemed to be accomplishing a highly technical skill of man’s !
It wasn’t until years later that the secret of the trick was revealed. The owner had trained Clever Hans to respond to slight signals. The horse became so sensitive that he learned when to stop from the crowd’s reaction. Members of the audience would start involuntarily, or give some unconscious signal, when Hans reached the right answer. Modern scientists now warn against the Clever Hans syndrome (综合征), whereby researchers unconsciously give clues to their animal subjects about the actions they like to see performed!

A:animal intelligence B:mathematical skills C:Clever Hans D:unconscious behavior

It was clever ______ at the answer in two minutes.

A:of him to arrive B:for him to arrive C:for his arriving D:of his arriving