40. What is this passage mainly about?
(A) Experts have little faith in the prospect of American society to defeat COVID-19.
(B) The COVID-19 pandemic brings challenges to people and may bring the nation to a different path.
(C) Public health plays a crucial role in defeating the war with COVID-19.
(D) Generation C is the most vulnerable age group of COVID-19 pandemic.
(E) Investment in virology and vaccinology is the key to defeat COVID-19.
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(B) The COVID-19 pan...
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題目翻譯: 這篇文章主要在講什麼? 選...