1. One authority made a census of the spiders in a grass field in the south of England, and he ______ that there were more than 2,250,000 spiders in one acre.
A. assessed
B. estimated
C. appraised
D. evaluated
 
2. We are meant to live dangerously and should not be sheltered. Life is a perilous adventure; its richness is in its ________.
A. hazards
B. security
C. peace
D. length





  1.B
【句意】一位权威人士对英国南部一块草坪上的蜘蛛进行了统计, 他估计那里每英亩有225万多只蜘蛛。
【解析】动词词义辨析。assess（其过去式为assessed）“评定，估价”；estimate（其过去式为estimated）“估计，估量”；appraise（其过去式为appraised）“评价，鉴定，估价”；evaluate（其过去式为evaluated）“评价，估价”。由关键信息“more than 2,250,000 spiders in one acre每英亩有225万多只蜘蛛”知“估计”符合，故B项正确。
2.A
【句意】我们打算危险地生活，因此不应受到庇护。生活是一场危险的冒险；它的丰富多彩在于它的危险。
【解析】名词词义辨析。hazard “危险；危害”；security“安全；担保”； peace“和平”；length“长度”。由句中关键词“Life is a perilous adventure生活是一场危险的冒险”与“its richness它的丰富多彩”的对应知“危险”符合语境，故A项正确。