Question

She heard the train pulling out of the station when she__________ for her sandwich at the platform.
A) Paid
B) Had Paid
C) Was Paying
D) Had Been Paying

Answer 1

She heard the train pulling out of the station when she was paying for her sandwich at the platform.

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Answer 2

Answer:

she heard the train pulling out of the station when she paid for her sandwich at the platform.