Lexis and structure: Choose the option that best completes the gap. The students, along with their teacher, ___ for an excursion next week.
Lexis and structure: Choose the option that best completes the gap.
The students, along with their teacher, ___ for an excursion next week.
Explanation
The subject is “students” (plural), so the verb must be plural: “are leaving.” The phrase “along with their teacher” is additional information set off by commas – it does not change the subject.
This is different from “students AND their teacher” which would also be plural but for a different reason (compound subject).
Rule: Phrases like “along with,” “together with,” “as well as,” and “including” do not make a singular subject plural. The main noun determines the verb form.