1. It can be inferred from the passage thatscientists of the 18th century .

　　A) thought that they knew a great deal andcould solve most problems of science

　　B) wereafraid of facing up to the realities of scientific research

　　C) knew thatthey were ignorant and wanted to know more about nature

　　D) did moreharm than good in promoting man's understanding of nature

　　2. According to the author, really good science_______ .

　　A) wouldsurprise the brightest minds of the 18th century Enlightenment

　　B) willproduce results which cannot be foreseen

　　C) will helppeople to make the right choice in advance

　　D) willbring about disturbing results

　　3. Which of thefollowing statemcnts is NOT true of scientists in earlier times?

　　A) Theyinvented false theories to explain things they didn't understand.

　　B) Theyfalsely claimed to know all about nature.

　　C) They didnot believe in results from scientific observation.

　　D) They paidlittle attention to the problems they didn't understand.

　　4. The authorbelieves that ______ .

　　A) man canfind solutions to whatever questions concerning nature he can think up

　　B) man can not solve all the problems he canthink up because of the limits of human intellect

　　C) sooner or later man canthink up all the questions concerning nature and answer them

　　D)questions concerningconsciousness are outside the scope of scientific research

　　5. What is theauthor's attitude towards science?

　　A) He isdepressed because of the ignorance of scientists.

　　B) He isdoubtful because of the enormous difficulties confronting it.

　　C) He is confidentthough he is aware of the enormous difficulties confronting it.

　　D) He is delighted because of theilluminating scientific findings.