Explanation: A mechanic is someone who repairs or maintains machines, tools, or vehicles. The word "equipment" (which refers to machinery or tools) fits best in this context. The other options do not fit: Situation – Does not relate to a mechanic’s job. Decision – Unrelated to what a mechanic looks after. Employees – A mechanic maintains machines, not people.

Explanation: The sentence suggests that the people could not find a house within their budget. The word "afford" means to have enough money to pay for something, making it the best choice. The other options do not fit: Obtain – Means to get or acquire, but does not imply financial capability. Demand – Means to request or require, which does not make sense here. Get – Too general and does not specifically refer to financial ability.

Explanation: The sentence suggests that research is being conducted to study how the new drug impacts people or their health. The word "effects" refers to the results or consequences of something, making it the best choice. The other options do not fit: Expenses – Refers to costs, which is unrelated to research on a drug. Interests – Means concerns or curiosities, which does not fit. Views – Refers to opinions, which is not the focus of drug research

Explanation: The sentence suggests that the tourists felt disturbed or saddened by the poverty they saw. The word "upset" means emotionally troubled or distressed, making it the best choice. The other options do not fit: Damaged – Refers to physical harm, which does not apply to emotions. Contented – Means satisfied or happy, which is the opposite of what the sentence implies. Involved – Means taking part in something, which does not fit the context.

Explanation: The sentence suggests that she did not pay attention to the warning and swam far out anyway. The word "ignored" means to deliberately not pay attention to something, making it the best choice. The other options do not fit: Listened – Means she paid attention, which contradicts the meaning. Reminded – Means to make someone remember, which does not fit. Continued – Does not convey the idea of disregarding a warning.

Explanation: The sentence suggests that he paused or took a moment to think before answering. The word "hesitated" means to pause before doing or saying something, making it the best choice. The other options do not fit: Slipped – Means to lose balance or fall, which is unrelated. Arrested – Means to be taken into custody, which does not fit. Spent – Refers to using time or money, which does not make sense here.