1) You won’t pass the exam ______ you study hard. a) unless b) if 2) I'll lend you my bike ______ you promise to return it by 5 p.m. a) unless b) in case c) providing that 3) If water reaches 100°C, it boils. a) zero conditional b) first conditional 4) She won’t be happy ____ you apologize. a) if b) unless c) providing 5) If you ______ too much coffee, you ______ trouble sleeping. a) drink / will have b) will drink / have c) drink / had 6) If you mix red and blue, you get purple. a) zero conditional b) first conditional 7) We’ll go hiking tomorrow, ______ the weather is good a) if only b) unless c) providing that 8) I'll buy the tickets, provided that everyone ______. a) agrees b) agreed c) agree 9) If it ______ (rain) tomorrow, we ______ (stay) at home. a) will rain / will stay b) rains / will stay c) rain / will stay 10) If you eat too much cake, you will feel sick. a) zero conditional b) first conditional

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