![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Questions 9-13 Reading Passage 1 contains a number of opinions provided by four different scientists. Match each opinion (Questions 9-13) with the scientists A-D. NB You may use any of the scientists A-D more than once. Amateur involvement can also be an instructive pastime.