問題詳情

They can strike anywhere, anytime. Wherever we go and whatever we do, we are approached by invaders from an unseen world. A menagerie of microscopic pests constantly assaults every part of our bodies, __20___ for a way inside. Many are harmless or easy to fight off; __21___ are merciless killers. And for all the vaunted power of modern medicine, deadly infections are __22___ threat. Just 30 years ago, medical researchers boasted that victory against infectious diseases was simply __23___. That thinking was demolished by the advent of a number of diseases, particularly AIDS. The question is no longer: When will infectious diseases be wiped out? __24___, it is: Where will the next deadly new plague appear?
20.
(A) and look
(B) looking
(C) looked
(D) look

參考答案

答案：B
難度：簡單0.766667
統計：A(10),B(46),C(3),D(1),E(0) #
個人：尚未作答書單：look的片語

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