C．His damaged brain.

　　D．The doctor's wrong diagnosis.

　　解析：选B　推理判断题。由第一、二段可知，不知情的莱特先生注射了Krebiozen并得到医生的宽慰后奇迹般地好了，但得知医生给他注射的药物被官方证实是假的后他很快就死了，由此可知，真正导致他死亡的原因其实是他自己的信念。

　　3．What's the purpose of Paragraph 3?

　　A．To explore the biology of human brains.

　　B．To explain why people get cancer.

　　C．To analyse how placebos work.

　　D．To question Mr Wright's story.

　　解析：选C　段落大意题。由第三段科学家对宽慰作用的研究可知，本段旨在解释信念这样的安慰剂是如何对人起作用的。

　　4．What does Dr Anne Harrington think of the placebo effect?

　　A．It is limited. B．It is effective.

　　C．It can cheat patients. D．It goes against science.

　　解析：选B　推理判断题。最后一段Dr Anne Harrington说宽慰剂是一种起治愈作用的谎言，并作为一种治疗方法用于开导焦虑的病人，故推测她认为宽慰作用是有效的。

　　B

　　We have two daughters: Kirsten is seven years old and Kelly is four. Last Sunday evening, we invited some people home for dinner. I dressed them nicely for the party, and told them that their job was to join me in answering the door when the bell rang. I would introduce them to the guests, and then they would take the guests' coats upstairs and put them on the bed in the second bedroom.

　　The guests arrived. I introduced my two daughters to each of them. The adults were nice and kind and said how lucky we were to have such good kids.

　　Each of the guests made a particular fuss over Kelly, the younger one, admiring her dress, her hair and her smile. They said she was a remarkable girl to be carrying coats upstairs at her age.

　　I thought to myself that we adults usually make_a_big_"to_do"_over the younger child because he/she is the one who seems more easily to be hurt. We do it with the best intention.

　　But we seldom think of how it might affect the other child. I was a little worried that Kirsten would feel she was being outshone. I was about to serve dinner when I realized that she had been missing for twenty minutes. I ran upstairs and found her in the bedroom, crying.

　　I said, "What are you doing, my dear？"

She turned to me with a sad expression and said, "Mommy, why don't people like me the way they like my sister? Is it because I'm not pretty? Is that why they don't say nice things about me？"