Read the sentence carefully and choose suitable preposition for the purpose.…

Solution: The correct answer is "through".

Key idea: choose the preposition that expresses passing via an opening or passage.

• Why "through" is correct: "Through" shows movement across or via an opening. Example: He entered through the gate (he passed via the gate into the area).

• "Into" denotes movement to the inside of something (for example, "He walked into the room"). It can be used when emphasising going into an enclosed space, but with a gate English normally uses "through the gate".

• "From" indicates origin or starting point (for example, "She entered from the back door"). It highlights where the movement began, not the act of passing through an opening.

• "In" is used for location or time (for example, "She entered this college in 2000" or "He is in the room"). It does not describe movement through a gate.

Correct sentence: He entered through the gate without any difficulty.