19.　 He used the latest ideas and technical inventions of his day in his books.

18.　 botany, applied science and many other subjects

17.　 make a living

16.　 Verne developed his love for the theater.

15.　 steam-powered boat

14.　 light bulb

13.　 electric railway

12.　 I can’t imagine his being so rude.

11.　 I doubt whether you are a good student. / I don’t doubt that you are a good student. / There is no doubt that you are a good student.

10.　 Science fiction is often about things we believe may be possible in the far future.