He arrived . . . . . . . . the airport . . . . . . . . time for the plane. A. in, in B. at, on C. on, in D. at, in

The correct answer is: A. in, in

• “In” is used to indicate a place or location.
• “In time” means “before the deadline or the expected time.”

In this sentence, “He arrived in the airport” indicates that he arrived at the airport. “In time for the plane” means that he arrived before the plane was scheduled to leave.

The other options are incorrect because:

• “At” is used to indicate a specific time or place.
• “On” is used to indicate a date or day.
• “At, in” is not a grammatically correct combination.