题目

一位渔民在长江口打鱼时捞到一头“大死鱼”。它身体呈鱼形，体长 3 米，背呈浅蓝色，头部有一吻，上下颌有牙齿 30 颗，眼不发达，头顶有一呼吸孔。解剖体内有一脊柱，有肺、心脏、胃、肝、肠等器官，与人相似，还怀有已死亡的幼体。围观村民们议论纷纷，对这“动物”的类别进行探究。①提出问题：？②建立假设：Ⅰ村民甲认为此“动物”是鱼类；Ⅱ村民乙认为此“动物”是哺乳类。③获取证据：村民甲的证据：Ⅰ；Ⅱ生活在长江口。村民    It was not yet eleven o’clock when a boat crossed the river with a single passenger who had obtained his transportation at that unusual hour by promising an extra fare. While the youth stood in the landing-place searching in his pockets for money, the boatman lifted a lantern(lamp), by the aid of which, studied the stranger’s figure. He was a young man of barely eighteen years old, evidently country bred, and now, as it seemed, on his first visit to town. He was wearing a rough gray coat, which was in good shape, but which had seen many winters before this one. The trousers were made of leather, and fitted tightly to a pair of muscular legs; his stockings of blue yarn (毛线) must have been the work of a mother or sister, and on his head was a three-cornered hat, which in its better days had perhaps sheltered the grayer head of his father. In his left hand was a walking stick, and his equipment was completed by a leather bag not so heavy as to give burden to the strong shoulders on which it hung. Brown, curly hair, well-shaped features, bright, cheerful eyes were nature’s gifts, and worth all that art could have done for his adornment(装饰). The youth, whose name was Robin, paid the boatman , and then walked forward into the town with a light step, as if he had not already traveled more than thirty miles that day. As he walked, he surveyed his surroundings as eagerly as if he were entering London or Madrid, instead of the little metropolis (主要城市) of a New England colony.67. At what time of day did the youth cross the river?      A. Morning.       B. Midday.                C. Late afternoon.      D. Night.68. The stockings that the youth wore were obviously _____.      A. well worn     B. very expensive        C. handmade            D. much too big69. From the way he looked it was obvious that the youth was _____.      A. a wealthy merchant’s son            B. raised in the country      C. an experienced farmer                   D. wearing some adornments70. The youth was probably going to town _____.       A. to buy new clothes                           B. for the first time      C. for the first time in several years         D. on one of his regular trips there71. The coat which the young man was dressed in _____.      A. was new and in good shape               B. was cut out very well      C. had been used for a lot of years          D. fitted him well