Which of the following makes Covid-19 a once-in-a-century pandemic?‍‏‍ A: It has a higher fatality rate than any other recorded influenza pandemic. B: It kills not only adults but also children. C: It can transmit at an exponential rate. D: The health systems are stretched thin in LMICs.

The WHO decalared COVID-19 a pandemic.

Britain has a more positive policy on COVID-19. pandemic.

The WHO decalared COVID-19 a pandemic. A: 正确 B: 错误

2020年的东京奥运会，受疫情影响将推迟到2021年举行。 A: The 2020 Tokyo Olympic Games will be postponed to 2021, affecting by the COVID-19 pandemic. B: The 2020 Tokyo Olympic Games will postpone to 2021, affected by the COVID-19 pandemic. C: The 2020 Tokyo Olympic Games had been postponed to 2021, affecting by the COVID-19 pandemic. D: The 2020 Tokyo Olympic Games will be postponed to 2021, affected by the COVID-19 pandemic.

What is the best title among the following 4 titles for a research paper? A: Social determinants of health: the role of effective communication in the COVID-19 pandemic in developing countries B: The role of effective communication in the COVID-19 pandemic in developing countries C: Social determinants of health and the role of effective communication in the COVID-19 pandemic in developing countries D: Effective communication in the COVID-19 pandemic in developing countries

15)There are both challenges and opportunities brought about by COVID-19 pandemic.

The international conference keeps _________ due to the COVID-19 pandemic. (put off)

The outbreak of a flu _______ A: epidemic B: pandemic C: plague

Which is most widespread? A: an outbreak B: an epidemic C: a pandemic