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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統計: A(11), B(317), C(27), D(1), E(3) #2314570

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(B) The COVID-19 pan...
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