根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多余选项。
注意：如果选E 请涂 AB ; 选 F请涂 AC; 选G请涂AD .
When people get a bad toothache, they often have to eat soft, easily chewed food.  ___小题1:__ That’s the conclusion of a zoologist at the Field Museum of Natural History in Chicago and a dentist who works on carnivores (食肉动物).
___小题2:__ Every once in a while, however, a lion will go on a human-eating diet.  The most famous such tragedy happened in 1898, when two lions killed and ate 135 railway workers in Kenya. 
Examining the preserved skulls of the two big lions, zoologist Bruce Patterson and dentist Ellis Neiburger found that both animals had been suffering from several dental and jaw problems. ___小题3:___ Canines are pointed teeth that hunting animals use for gripping and piercing prey . 
The two lions might have been so badly disabled that they couldn’t bite down forcefully, say the researchers. Consequently, the lions might have abandoned their normal, more difficult prey and turned to humans.  Patterson said “____小题4:_____ We’re very slow, we don’t hear very well, and we don’t see very well in the darkness.”
______小题5:____ It was inspired partly by the work of Jim Corbett, a tiger hunter in India in the 1930s.  Corbett was regularly called in to hunt tigers that had been dining on Indian villagers. Time after time, Patterson discovered that the killer tigers were suffering from some ill-healthy conditions.
 
注意：如果选E 请涂 AB ; 选 F请涂 AC; 选G请涂AD .
A. Humans are easy preys.
B. Lions don’t normally prey on people.
C. When lions get a bad toothache, they eat people
D. One lion had three missing teeth and a loose, unsteady lower canine that was probably useless.
E. The research calls their idea the Infirmity Theory.
F. He had absolutely no experience taking medicine.
G. Talking about it in the abstract isn’t enough.