2. 外语
  3. Wills argues that certain malarial parasites are especially(i)______because they have more recently entered humans than other sp

Wills argues that certain malarial parasites are especially(i)______because they have more recently entered humans than other sp

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问题 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.
选项
答案B，E，H
解析 The "Yet" that begins the second sentence indicates that Wills’ position would be supported by evidence that the newer parasites are in humans, the more harmful they are. So Wills’ position must be that more recent parasites are especially harmful, implying that "malignant" is the correct choice for the first blank. What follows "therefore" is a potential explanation for the trend that Wills expects, namely an evolution toward harmlessness, implying "benignity" for the third blank, with newer species having had "insufficient" time(second blank)to evolve toward harmlessness.
Thus, the correct answer is malignant(Choice B), insufficient(Choice E), and benignity(Choice H).
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