Раскройте скобки, образуя условные предложения : 1. if they had remembered your address, they (to send) you a posteard. 2. if tom saw a car crash, he (to telephone) the police. 3. if you are not sure, what to say, you (to have) to guess. 4. if she ( not to be) very ill, she wouldn't have been absent from english. 5. if my perents had god seats, they (to enjoy) the play last night.