36. Healthcare professionals believe that vaccines play a _____ role in preventing deaths caused by infectious
diseases.
(A) critical (B) digital (C) mineral (D) fiscal
37. To ensure that the food provided to customers is safe to consume, proper food safety rules must be followed
to ensure that food is not _____.
(A) fired (B) lied (C) tired (D) expired
38. The lack of _____ housing in the country has become a serious problem, especially for low-income
households.
(A) aggressive (B) affordable (C) affluent (D) addictive
39. Since 2005, Leonardo da Vinci’s Mona Lisa _____ in a protective glass case for safety requirements.
(A) exhibits (B) was exhibited
(C) has been exhibited (D) is exhibiting
40. _____ government efforts, many Japanese think gender equality has remained a problem in the country.
(A) Despite (B) Although
(C) Because (D) Without