57. What does the word “cheer” (Line 2, Para. 1) imply?

　　A) Imaginative men are sure of success in finding life on other planets.

　　B) Imaginative men are delighted to find life on other planets.

　　C) Imaginative men are happy to find a different kind of life existing on other planets.

　　D) Imaginative men can be pleased with the idea that there might exist different forms of life on other planets.

　　58. Humans on Earth today are characterized by .

　　A) their existence as free and separate beings

　　B) their capability of living under favorable conditions

　　C) their great power and effectiveness

　　D) their strong desire for living in a close-knit society

　　59. According to this passage, some people believe that eventually .

　　A) human societies will be much more cooperative

　　B) man will live in a highly organized world

　　C) machines will replace man

　　D) living beings will disappear from Earth

　　60. Even most imaginative people have to admit that .

　　A) human societies are as advanced as those on some other planets

　　B) planets other than Earth are not suitable for life like ours to stay

　　C) it is difficult to distinguish between organic parts and inorganic parts of the human body

　　D) organism are more creative than machines

　　61. It seems that the writer .

　　A) is interested in the imaginary life forms

　　B) is eager to find a different form of life

　　C) is certain of the existence of a new life form

　　D) is critical of the imaginative people