Matching Pairs First conditionalOnline version This exercise will help you to practice and reinforce the first conditional sentences. by María del Rosario Alonso 1 If you want to be fit, 2 Unless you work hard, 3 You will be under pressure 4 The baby won't sleep well 5 The pandemic won't stop you will have to exercise your body. you won't have the results you wish. unless everybody takes action. if she doesn't listen to music. if you don't organize your time.