1) I ... (go) to the theatre if I ... (buy)

1) I ... (go) to the theatre if I ... (buy) tickets. 2)If she ... (not come) in time the ... (be) late for the concert. 3)If I ... (get) tickets for the evening performance in advance I (ring) you up. 4)He ... (write) a letter today if he (have) free time. 5) ... you ... (call I me up if you (came) back early? 6)If you (not tell) me the truth I ... never (speak) to you. 7)If you ... (go) to bed immediately we ... (take) you to the cinema tomorrow. 8)If they ... (take) a taxi they ... (not miss)thetrain. 9)If you ... (lend) him the book he ... (read) it quickly.