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If there ______  heavy acid rain, the trees in this area_________.

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Many people would be out of work if that factory_____ down.

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If I didn’t work for an accounting firm, I _______ in a bank now.

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The death rate would decrease if hygienic conditions _____ improved.

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If she sold her car, she ______ much money.

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If farms _______ fewer pesticides, the water pollution would be less serious.

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I'm not tired enough to go to bed yet. I wouldn't sleep if I_____ to bed now.

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If the air was clean, we ____ have to wear masks when going out.