Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

The World Health Organization, which is a specialized agency of the United Nations, ___(1)___. It focuses on improving access to healthcare, especially in underdeveloped regions, ensuring that no one is left behind. Through its global health initiatives, the WHO has helped reduce the spread of diseases like tuberculosis and HIV. Additionally, it plays a key role in coordinating international responses to health emergencies, such as epidemics and pandemics.
WHO is responsible for coordinating international health efforts and providing support to countries in need. It works with governments and organizations to develop policies and strategies aimed at improving public health. WHO has a network of experts ___(2)___. The organization also assists in the training of healthcare professionals globally, ensuring that health systems are equipped to respond to emerging threats.
One of WHO's key roles is to provide emergency response during health crises. ___(3)___. In addition, WHO monitors global health trends to predict and prevent future pandemics. The organization also collaborates with governments and health experts to develop early warning systems and response strategies for emerging threats.
WHO's continuous efforts in health advocacy, research, and crisis management have made it a vital global entity. ___(4)___ improving global healthcare, fighting diseases, and providing health education are just some of the ways WHO is contributing to better health worldwide. Working together with governments and communities, ___(5)___.