THEY HAVE (A) BEEN ASKED ME (B) TO VISIT THEM (C) FOR AGES BUT I...

731) They have (A) been asked me (B) to visit them (C) for ages but I have never (D) had thetime.Part 3: ReadingRead the passages below and choose the correct answer among A, B, C or D.PURE SCIENCE AND APPLIED SCIENCEMany of the latest scientific accomplishments fall in the realm of "pure" science. This isresearch for the sake of increasing man's knowledge without concern about how theknowledge is going to be used. I contrast with pure science is "applied" science. Theproduction of synthetic diamonds is an example of applied science. In applied science thefacts and principles of pure science are used in the solution of a problem which has or willhave immediate economic and social importance.Often in the past, applied science has gone far ahead of pure science. Its practicalapplications have been used for man's good even before the basic facts and principles wereunderstood. For example, the telegraph, telephone and electric motor, which could not workwithout electrons, were invented before man discovered the electron. People were vaccinatedlong before viruses were investigated. Chemicals like sulphuric acid and soda weremanufactured before man began to understand the nature of the atom. Today, however, ifapplied science is to grow it must depend more and more on increased knowledge of purescience.