A.his knowledge of science and his own experiences in adventure.
B.his imagination and his love for science.
C.his own experiences in adventure and his imagination.
D.his knowledge of science and his imagination.


A.often correct.
B.totally accurate.
C.entirely wrong.
D.merely fairy stories.
A.making laws.
B.enforcing discipline.
C.educating the public.
D.holding ceremonies.
A.It should be raised by soldiers.
B.It should be raised quickly by hand.
C.It should be raised only by Americans.
D.It should be raised by mechanical means.