12.If your jokes often find already echo in a person, you will learn though ____ that telling jokes to this person is fun, and you will try with greater efforts to be humorous in his presence.

　　A) classical conditioning B) operant conditioning

　　C) neither of them D) some other sorts of conditioning

　　注：應用題

　　13. If a child is bitten or startled several times by a dog, he may learn to associate furry animals with pain or startle and thus develop a fear of furry animals. This is a typical example of learning

　　through ____.

　　A) classical conditioning B) operant conditioning

　　C) both of them D) neither of them

　　注：應用題， furry 有毛的

　　14. In the third paragraph, the author is ____.

　　A) discussing how we grow and have new experiences every day

　　B) talking about learning to modify emotions through operant conditioning

　　C) concentrating on learning by reading, watching television, interacting with people, and so on

　　D) using examples to further illustrate learning through classical conditioning

　　注：主題題，末端首句也是結論句。