III. Choose the word that best fits the blank space in the following passage. (1.5 pts)

Stop the Invaders
Even if you take good (17) ___________ of your body, you can still get sick sometimes. Germs can invade even a healthy body! Getting sick can make you feel miserable, but there are some things that you can do to help yourself get better quickly and be more (18) ___________. The first thing to do when you are not feeling well is to (19) ___________ your parents know.
Sometimes it is hard to tell whether you have a cold, the flu or something more serious. So your parents may take you to the doctor. Your doctor can do tests that will let you know what is making you sick. You may be sick (20) ___________ bacteria. Strep throat is an example of an illness caused by bacteria. If bacteria has made you sick, your doctor (21) ___________ give you antibiotics. Antibiotics are medicines that are designed to help your body get rid (22) ___________ the bacteria that is making you sick.
(https://www.englishreavealed.co.uk/PET/Reading_Part_5/pet_multiple_choice_cloze_4.php)