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.
句意:一位权威人士对英国南部一块草坪上的蜘蛛进行了数量调查，他估计在那个地方每公顷有超过225万只蜘蛛。
考查近义词辨析。四个选项均为对应动词的过去式。Assess评定,估价; estimate估计,估量; appraise估量,估价,(对某人的工作)做出评价; evaluate评价,估价。由关键信息more than 2,250,000 spiders in one acre (每公顷有225万只蜘蛛)可知B符合句意。
