If you____(follow) my advice to prepare well ahead, you wouldn’t have failed the exam.
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The city would look more beautiful if people____(throw) rubbish on the streets.
When I stopped talking, Sam finished my sentence for me as though he____(read) my mind.
If I could speak Spanish, I____(spend) next year studying in Mexico.
If you____(fail) your last exam, you would have graduated in May.