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Complete the detective's dramatic case notes by selecting the correct option for each blank.
The wind _________________________ and the rain was pouring down when the mysterious stranger finally _________________________ on my office door.
The wind was howling and the rain was pouring down when the mysterious stranger finally knocked on my office door.
The Past Continuous (was howling, was pouring) sets the background scene of a story. The Past Simple (knocked) introduces the main event or action that happens within that scene.