Fill the gaps with in, on, at whichever is correct. a) Tickets must be shown ...... the barrier. b) There is a newspaper shop.... my way to college. c) My college is .... the bank line. d) There are…

a) Tickets must be shown at the barrier. Explanation: We use "at" to indicate a specific point or location, especially when referring to a fixed structure like a barrier, gate, or entrance.

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b) There is a newspaper shop on my way to college. Explanation: "On" is used to describe a route or path, indicating that the shop is located along the way to college.

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c) My college is on the bank line. Explanation: "On" is used here to indicate a position along a linear feature (like a riverbank or roadside). However, a more natural phrasing would be "near the bank" or "along the bank" since "bank line" is not a standard expression. If the question intended "bank" (as in riverbank), "on" would be correct for a location along the edge.

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d) There are two islands in the lake. Explanation: "In" is used for locations inside a larger area, such as a lake, sea, or forest. Islands are enclosed within a body of water, so "in" is the correct preposition.

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e) There are crowds of people by the lake having sunbath. Explanation: The sentence is grammatically incorrect as written. The correct phrasing should be: "There are crowds of people by the lake sunbathing." or "There are crowds of people at the lake sunbathing."

• "By" is used to indicate proximity (near the lake).
• "At" can also be used for a general location near the lake.
• "Sunbathing" should be a present participle (verb + -ing) modifying "people" rather than a separate verb.

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Note on Prepositions: Prepositions like "in," "on," and "at" are used to show relationships between nouns (e.g., time, place, or direction). Their correct usage depends on context:

• "At" → Specific points (e.g., at the station).
• "On" → Surfaces or routes (e.g., on the table, on the road).
• "In" → Enclosed spaces (e.g., in the box, in the lake).

For e), the sentence structure was ungrammatical, so corrections were made to fit standard English usage. Always ensure verbs and modifiers align logically in sentences.