(Writing) in a terse, lucid style, the book (describes) the (author’s) childhood experiences in Louisiana (just before) the outbreak of the Civil War.

A．the total amount of oxygen over the earth
B．mixture of gases surrounding the earth
C．a source of storms
D．the diffusion of waste gas

A．uncommon in the world
B．not popular in U.S.A.
C．widespread in the world
D．founded among a few families