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Wills argues that certain malarial parasites are especially (i) ______ because they have more recently entered humans than other species and therefore have had (ii) ______ time to evolve toward (iii) ______. Yet there is no reliable evidence that the most harmful Plasmodium species has been in humans for a shorter time than less harmful species.
BLANK (i) BLANK (ii) BLANK (iii)
(A) populous (D) ample (G) virulence
(B) malignant (E) insufficient (H) benignity
(C) threatened (F) adequate (I) variability
正确答案: BEH
解析：
首先看blank2，they have more recentlyentered humans than other species and thereforehave had (ii) ______timeto evolve
1. Therefore表示对上文的承接，因为they最近才进入人体，因而在人体中的演变时间较短。
2. 选择与自主判读已知的词汇填空：
[1]. ample：(富饶的)generous or more than adequate in size, scope, or capacity
[2]. insufficient：(不足的)not sufficient : INADEQUATE; especially : lacking adequate power, capacity, or competence
[3]. adequate：(充足的)sufficient for a specific requirement