【简答题】A.He was a nurse working in a hospital. B.He was a medical doctor in a hospital. C.He was a journalist for a newspaper. D.He was a travel agent in San Francisco.
【简答题】A.He was first of all a scientist. B.He was a naturalist but not a scientist. C.He was no more than a born naturalist. D.He was a scientist as well as a naturalist.