单选题 In the jungle (丛林) you may get hopelessly lost within five minutes after starting. That is (36) you should always carry a compass (指南针). In open country, during the day, you can (37) which way to go by studying the (38) . At night, the stars are sure (39) to direction. In most places the jungle rooftop (顶) is so (40) that it is (41) to see the sun or the stars. (42) you must check your position by the (43) . Keep watchful (注意的,警惕的). Watch the ground in front of you carefully. (44) and listen now and a gain. Avoid (45) , and rest often. In a place (46) is hot and damp, the person who walks fast will soon become (47) . A steady (稳定的), slow step is wisest in the long run. If you (48) your way, don't be scared (恐惧的). Try to (49) how long it has been (50) you were sure of your position. Make a mark (51) you are on a tree. Put the marks on (52) of the trees, so that you'll be a ble to see them from any (53) . Then you can begin retracing your steps (顺原路返回) , knowing that you can always find the place (54) which you started. (55) try to travel through the jungle at night except in an emergency (紧急情况).

【正确答案】 B
【答案解析】句意:这就是你为什么总是要带指南针的原因。
【正确答案】 C
【答案解析】[C] tell在这里是“分辨,辨认”的意思。
【正确答案】 B
【答案解析】注意到前后两句表现为很明显的比较(during the day和at night)。所以空格要和the stars做比较,当然选sun。
【正确答案】 D
【答案解析】句意:在晚上,星星是可靠的方向向导。
【正确答案】 C
【答案解析】根据前后文,句子大概意思应该是:丛林太茂密了,以至看不到太阳或星星。所以选thick最切合题意。
【正确答案】 D
【答案解析】根据第40题的分析,应该是impossible。
【正确答案】 B
【答案解析】[A] Up and down,来来回回,[B] Again and again一再,没有[C] Day and day这个短语,日复一日是day after day,[D] All day long一整天。根据句子意思,选B最符合文意。
【正确答案】 B
【答案解析】没有了太阳和星星的帮助,当然只能靠上面提到的compass了。
【正确答案】 D
【答案解析】stop and listen now and again,时而停下来听听。
【正确答案】 B
【答案解析】紧跟在后面的and rest often提示这里是avoid hurry。
【正确答案】 B
【答案解析】后面从句缺一个主语,所以只能选B。
【正确答案】 C
【答案解析】根据常识,在一个又热又湿的地方,人走得太快将会很累。所以[C] tired最合理。
【正确答案】 D
【答案解析】固定用法:lose one's way,迷路。
【正确答案】 C
【答案解析】[C] decide在这里是判断的意思。
【正确答案】 B
【答案解析】这个空格要根据文章上下文来判断。句子意思是:你要判断从你能够确定的某个位置起,你已经走了多远。所以用since最好,表示从…时候起。
【正确答案】 D
【答案解析】只有where才能引导一个状语从句。
【正确答案】 B
【答案解析】根据后文,so that you'll be able to see them from any…,可知应该是你要在四个方向都放标志,这样从哪个方向都能看到标志。选[B] four sides最好。
【正确答案】 D
【答案解析】根据上题分析,应该选[D] direction。
【正确答案】 B
【答案解析】固定搭配:start from,从…开始。
【正确答案】 B
【答案解析】根据前文,夜间在丛林很容易迷路,所以只能选[B] Never。