单项选择题

Amongst the most popular books written today are those which are usually classified as science fiction. Hundreds of titles are (1) every year and are read by all kinds of people. (2) , some of the most successful films of recent years have been (3) on science fiction stories.
It is often thought that science fiction is a fairly new (4) in literature, but its ancestors can be (5) in books written hundreds of years ago. These books were often concerned (6) the presentation of some form of ideal society, a (7) which is still often found in modern stories.
Most of the classics of science fiction, (8) , have been written within the last one hundred years. Books by writers such as Jules Verne and H. G. Wells, to (9) just two well-known authors, have been translated into many languages.
Modern science fiction writers don’t write about men from Mars or space adventure stories. They are more interested in (10) the results of technical developments on society and the human mind; or in (11) future worlds which are a reflection of the world which we live in now. (12) this, their writing has obvious (13) implications.
In an age where scientific fact frequently (14) science fiction, the writers may find it difficult to keep (15) scientific advances. Those who are (16) clear-sighted to see the way we are going, however, may provide a valuable (17) on how to deal with the problems which society will (18) face as it tries to (19) its new technology and come to terms with a continually (20) view of the world.

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