get Ebola under control, there'll be the satisfaction of knowing I did a job that maybe not everyone could have done and that I played a small part in helping to overcome this terrible disease.

21. In Liberia, the author mainly _____.

A. raised patients' spirits

B. studied the deadly virus

C. tried to find a cure for Ebola

D. tried to stop Ebola spreading

22. The underlined word "scrubs" in Paragraph 3 refers to _____.

A. some belts to help move the patients

B. something marking their positions

C. something to keep them warm

D. some clothes to keep them safe

23. If an infected patient's relatives visit, they can _____.

A. arrange a viewing

B. play a special game with him

C. have physical contact with him

D. take care of him for a few days

24. Which of the following best describes the author?

A. Determined and optimistic.

B. Warmhearted and honest.

C. Talented and patient.

D. Brave and caring.

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