Stating your topic is vitally important to the speech introduction.（）

A、novel

B、poetry

C、drama

D、criticism

Listen to the speech again and complete the outline below. After the listening, you may organize the speech with the outline in this exercise. 音频3 I. life expectancy --born in (1) _____: over the age of 48 --dip there for the 1918 flu. --born in 2010: (2) ______ II. diseases and medicine a. Gap--diseases we now know the exact molecular basis: about (3) _____ vs. diseases now have treatments available: Only about (4) _____ b. What we think: fundamental information to application: a (5) _____ vs. reality: (6) _____ shiny bridge a swimmer, a rowboat , a sailboat ,a tugboat if you're lucky, somebody gets across. III. Why so hard Drug: A small molecule, a few atoms all in a (7) _____ determine whether to hit its target. Process to develop a drug: start out with thousands of compounds weed down through various steps run a clinical trial (8) _____ after you started, you will get one approval. Cost (9) ______ for that one success. 1.

A、establishing credibility and goodwill

B、supporting your main points

C、revealing the topic of the speech

D、previewing the body of the speech

B．supporting your main points

C．revealing the topic of the speech

D．previewing the body of the speech