A.I. Explanation:

Correct answer: action

Explanation: The word 'action' fits grammatically as a noun that complements the verb 'can take,' indicating what the United Nations can do. Contextually, it aligns with the organization's role in addressing issues, making it the most suitable choice.

Meaning: 'Action' refers to the process of doing something, especially to achieve an aim, which in this context relates to the UN's ability to address various global issues.

Wrong options:

• reaction: 'Reaction' implies a response to something that has already happened, which does not fit the proactive context of the UN's capabilities.
• expectation: 'Expectation' refers to a belief about what will happen in the future, which does not align with the UN's active role in taking measures.
• expression: 'Expression' relates to conveying thoughts or feelings, which does not fit the context of taking measures or steps.

Correct answer: express

Explanation: The verb 'express' is appropriate here as it indicates the action of conveying views, fitting grammatically with the subject 'Member States' and contextually with the idea of sharing opinions in a forum.

Meaning: 'Express' means to convey or communicate thoughts, feelings, or opinions, which is what the Member States do in the UN's forums.

Wrong options:

• regret: 'Regret' implies a feeling of sadness or disappointment about something that has happened, which does not fit the context of sharing views.
• extend: 'Extend' generally means to increase in length or duration, which does not apply to the act of conveying views.
• press: 'Press' can mean to apply pressure or insist, which does not align with the context of simply sharing opinions.

Correct answer: corner

Explanation: The word 'corner' fits well as it refers to a specific area or part of something, and in this context, it conveys the idea of reaching every part of the globe, making it a suitable choice grammatically and contextually.

Meaning: 'Corner' in this context means a part or region of the world, emphasizing the global reach of the UN's work.

Wrong options:

• place: 'Place' is too vague and does not convey the same sense of specificity as 'corner' in relation to the globe.
• time: 'Time' refers to a period or duration, which does not fit the spatial context of the sentence.
• stage: 'Stage' typically refers to a particular point in a process or development, which does not align with the geographical context.

Correct answer: prevention

Explanation: The noun 'prevention' fits grammatically as it complements the context of the UN's efforts to stop conflicts before they escalate, making it the most logical choice in this context.

Meaning: 'Prevention' refers to the act of stopping something from happening, particularly in the context of avoiding conflicts.

Wrong options:

• aggregation: 'Aggregation' refers to the process of collecting or gathering, which does not fit the context of stopping conflicts.
• implementation: 'Implementation' means putting something into effect, which does not align with the proactive nature of preventing conflicts.
• extension: 'Extension' implies lengthening or expanding, which does not relate to the concept of stopping or preventing conflicts.