After exploring for more than half a year the ecologist felt a great ______ resulting from the rare species the team had spotted at the foot of the mountain.
【正确答案】
A
【答案解析】 名词词义辨析。thrill“兴奋，激动”；tremble“内心的颤抖，战栗”；lust“渴望，强烈的愿望”；thrift“节俭，节约”。根据句意，发现rare species the team应该是使ecologist感到兴奋。故答案为A。