1. What type of grammatical signal is used in line 1 of paragraph 1?
A. Claim and Counterclaim
B. Cause and Effect
C. Problem and Solution
D. General to Particular
2. What is the function of the underlined word in line 2 of paragraph 2?
A. To describe a problem
B. To introduce a cause
C. To introduce an effect
D. To describe a solution
3. How does vaccine work?
A. By using antigens
B. By introducing a strong form of the virus
C. By copying an infectious agent supplements
D. By taking vitamin C and other
4. Which sentence is TRUE?
A. Vaccines are dangerous for the elders.
B. Vaccines create higher chances of getting the virus.
C. Vaccines give 100 percent effectiveness to everyone.
D. Vaccines enable our immune system to fight viruses on its own.​