单选题

　　1.【完成句子】Most of the classics of science fiction,however,have been written within the last hundred years. Books by writers such as Jules Verne and H.G. Wells,to mention just two well-known authors,have been translated into many languages.

　　Book written by J. Verne are__________.

　　A.science fictions with a recurrent theme

　　B.concerned with the problems that we have to solve in the future

　　C.read worldwide

　　D.political implications