If it (rain), the grass gets wet., If it doesn't rain tomorrow, we (go) to the park., He (be) in trouble if he arrives late., If you (not make) an appointment, the doctor won't see you. , I will have a party in the garden if it (not rain)., If you heat water to 100 degrees Celsius, it (boil)., If you study hard, you (pass) the exam. , You (not pass) the exam if you don't study., She will go to the party if she (tidy) her room., If the weather (be) nice, we will go to the park., If I were rich, I (buy) an expensive car., If he (not study) so much, he wouldn't get good grades..

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