Directions: In this section, there are four passages followed by questions or unfinished statements, each with four suggested answers A,B.C andD.Choose the best answer and mark your answer on the ANSWER SHEET.

Passage Two

　　In spite of his love of theorising, the prehistorian Louis Leakey took nothing for granted and always put everything to a practical test.He became an expert maker of stone tools, and would use them to skin and chop up animals.Even this was not enough: to prove that man had to be a tool maker to survive, he tried unsuccessfully to skin animals with his teeth.

　　Louis could show amazing patience if necessary, but by nature he was hasty.His inclination was to get on with the next job rather than do dull trivial matters.Although unsuited to making detailed excavation and minute studies of fossils he did both successfully; he had tremendous self-discipline and would cheerfully work all night if necessary.He was never good at working other people, especially with men, and always wanted to tackle everything himself.

　　Although always an individualist and happiest in the bush, he was stimulated by company and blossomed at conferences.He was very adaptable and, curiously, when he lived in Nairobi he enjoyed such suburban pursuits as dog shows and breeding tropical fish.Not gardening, however, this have been too slow, and for relaxation he preferred to clean a fossil.

　　Louis had a great ability to make complicated subjects seem straightforward: he loved to share his vast knowledge, and however tired he might be, he would respond to an intelligent question.His finds brought him fame in scientific circles, but his way of talking about them- and him-known to a much wider public.His frequent appearances on the lecture platform and television screen in the USA, and the circles about him in popular journals brought him an enormous fan-mail.He tried to answer all these letters personally, often arranging to meet the writers if he felt their interest was genuine, and he would go to endless trouble to help anyone he thought worthy of encouragement.
When it came to more tedious side of his work, Louis _____.

A.a famous orator

B.very handsome

C.President of the United States at the time

D.a popular statesman