题目内容：

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1.Scientists have been doing some r________ on how to improve the life expectancy of people.

2.Doctors risking their life to fight against COVID-19 really d________ to be respected.

3.She returned home and found her furniture had been r________ by the flood.

4.Another 30 million U.S. dollars, d________ by China to the World Health Organization have been used in support of global efforts to the construction of public health systems.

5.Mary worked as a t________ secretary in her spare time for three months and ended up getting a full-time job.

6.Because of the economic crisis, more and more people lose their jobs, feeling very s________.

7.The Olympic Games function as a stage where all p________ show their talents and spirits in various competitions.

8.No matter how c________ the situation was, he could deal with it calmly and successfully.

9.Since the coronavirus came from nature, no country should be b________ for the pandemic.

10.There is no p________ that the disappearance of bees has a close connection with the radiation of the mobile phones.