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例3. 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.
(B) malignant
(C) threatened
4. The question of (i) ______ in photography has lately become nontrivial. Prices for vintage prints (those make by a photographer soon after he or she made the negative) so drastically (ii) ______ in the 1990s that one of these photographs might fetch a hundred times as much as a nonvintage print of the same image. It was perhaps only a matter of time before someone took advantage of the (iii)
______ to peddle newly created “vintage” prints for profit. (A) forgery
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