A.I. Explanation:

Correct answer: conducted

Explanation: The word 'conducted' is the past participle of the verb 'conduct,' which fits grammatically in the passive voice structure of the sentence. It indicates that the study was carried out by someone, aligning with the context of discussing research activities.

Meaning: 'Conducted' means to carry out or perform a particular activity, especially in a formal or organized manner.

Wrong options:

• report: The word 'report' is a noun or verb that does not fit the grammatical structure here, as it does not indicate the action of carrying out a study.
• obliged: The word 'obliged' is a past participle that means to be required to do something, which does not fit the context of conducting a study.

Correct answer: re-explore

Explanation: The term 're-explore' is a verb that indicates the action of investigating or examining something again. It fits grammatically as it follows 'may,' which requires a base form of the verb, and contextually aligns with the idea of revisiting previous findings.

Meaning: 'Re-explore' means to investigate or study something again, particularly to gain new insights or confirm previous results.

Wrong options:

• report: The word 'report' does not fit here as it does not convey the action of investigating; it is more about presenting findings rather than exploring them.
• become: The word 'become' is a verb that indicates a change of state, which does not align with the context of revisiting findings.

Correct answer: determine

Explanation: The word 'determine' is a verb that fits grammatically as it follows 'help,' which requires a base form of the verb. Contextually, it aligns with the purpose of the research, which is to find out or establish the status of students' expectations and perceptions.

Meaning: 'Determine' means to establish or ascertain something, particularly through analysis or investigation.

Wrong options:

• report: The word 'report' does not fit as it does not convey the action of finding out or establishing; it is more about presenting information.
• become: The word 'become' does not fit in this context as it implies a change rather than the act of finding out or establishing.

Correct answer: remain

Explanation: The word 'remain' is a verb that fits grammatically in the present tense, indicating a state of being. It aligns with the context of discussing whether students' expectations and perceptions are unchanged or altered over time.

Meaning: 'Remain' means to continue to exist or stay in the same state.

Wrong options:

• report: The word 'report' does not fit here as it does not convey the idea of staying the same; it is more about presenting findings.
• become: The word 'become' implies a change in state, which contradicts the context of discussing constancy.