Meaning: 'Strung' in this context means to be in a state of anxiety or distress, often due to drug use, indicating that the person is feeling overwhelmed or stressed.

Wrong options:

• stunned: 'Stunned' means shocked or surprised, which does not fit the context of someone being affected by drugs.
• strong: 'Strong' refers to physical strength or intensity, which is unrelated to the emotional or mental state described in the sentence.
• stung: 'Stung' refers to being bitten or hurt by an insect, which does not apply to the context of drug use or emotional distress.

Correct answer: dental

Explanation: The word 'dental' is the correct choice as it refers to a check-up related to teeth, which fits the context of a health check-up that someone might have after a long time. It is a specific type of medical examination that aligns with the overall theme of health and recovery.

Meaning: 'Dental' pertains to teeth or dentistry, indicating that the person is likely to have a check-up related to their oral health after a long period without one.

Wrong options:

• academic: 'Academic' relates to education or scholarly pursuits, which does not fit the context of a health check-up.
• relative: 'Relative' refers to family members or comparisons, which is unrelated to the type of check-up being discussed.
• indirect: 'Indirect' means not straightforward or not direct, which does not apply to the context of a health examination.

Correct answer: substances

Explanation: The word 'substances' is appropriate as it refers to drugs or chemicals that individuals may be dependent on, fitting the context of addiction and health. It is a plural noun that aligns with the idea of various drugs that people might use.

Meaning: 'Substances' refers to drugs or chemical compounds that individuals may be addicted to, highlighting the focus on addiction treatment and recovery.

Wrong options:

• incomes: 'Incomes' refers to earnings or financial gain, which does not relate to the context of drug dependency.
• concerns: 'Concerns' means worries or issues, which does not fit the context of dependency on drugs.
• minds: 'Minds' refers to mental faculties or consciousness, which is not the focus of the sentence regarding drug use.

Correct answer: facilitates

Explanation: The word 'facilitates' is the correct choice as it means to make an action easier or to assist in the process, which aligns with the context of providing a safe space for injection. It is a verb that fits grammatically and contextually within the sentence.

Meaning: 'Facilitates' means to make something easier or to help it happen, indicating that the center is designed to support safe drug use rather than prevent it.

Wrong options:

• patronizes: 'Patronizes' means to treat with an apparent kindness that betrays a feeling of superiority, which does not fit the supportive context of the center.
• disallows: 'Disallows' means to prohibit or forbid, which contradicts the purpose of the center as described in the text.
• funds: 'Funds' refers to providing financial support, which does not align with the action of enabling or assisting in drug use.

Correct answer: purpose

Explanation: The word 'purpose' is fitting as it refers to the intended goal or reason for the center's existence, aligning with the context of keeping people alive. It is a noun that fits grammatically and logically within the sentence.

Meaning: 'Purpose' means the reason for which something is done or created, indicating that the center's main goal is to ensure the safety and survival of individuals.

Wrong options:

• reciprocity: 'Reciprocity' refers to mutual exchange, which does not apply to the context of the center's goals.
• risk: 'Risk' refers to the possibility of harm or loss, which does not capture the intended meaning of the center's function.
• effect: 'Effect' means the result of a cause, which does not convey the intended goal or reason for the center's operation.