听力原文：M: Well, how' s the patient this morning? W: He appears to have had a very restless night. M: Oh. Was he in very severe pain? W: Yes. I' m afraid he was, doctor. M: Hmm. In that case, I think we' d better increase his dosage of diamorphine. W: Yes, doctor. By how much? M: Let' s see. How much is he on at the moment? W: Five milligrams. M: Hmm. Increase it to fifty. W: Fifty? All at once? M: Yes, that' s what I said, nurse. W: But that' s an increase of forty - five milligrams. M:I' m quite aware of that. However, when I operated on the patient yesterday, I found his abdomen was riddled with carcinoma. I' m sure you realize what that means. W: Yes, I do, doctor. But I still don' t feel I can accept responsibility for administering such an increase. M: Can't you? What exactly do you suggest, than? W: That if you' re convinced it' s the right thing to do, you ought to administer the injection yourself. M: Hmm. I see what you mean. Very well, I will. (20)