. You are explaining a decision you made in the past that led to a positive result. Which sentence is correct?
A. Had I known about the traffic, I would have left earlier.
B. I have left earlier if I knew about the traffic.
C. If I knew about the traffic, I would leave earlier.
D. If I had known about the traffic, I would have left earlier.

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A. nouns, verbs, adjectives
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You _____ to your manager before you book your holiday.
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They ____ to the gym every Saturday.
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