1. Complete the sentences. Use the first conditional forms of the verbs.1.If you...............(clean) the window, I .............(hung) the curtain.2.Unless she..............(be)ill, we ...........(go) to the swimming pool.3.They...............(not/let you in) if you ............(come) late.4.Providing he.............(propose)you, what...............(you/do)?5..............(tell) him to phone me if you........(see)him.6.The doctor...........(not/help) you if you .............(not/tell) the truth.7.If my best friend...........(betray)me, I............(never/speak) to her again.8.Probably they .............(have) more time for me if they..........(change) jobs.9.I..............(give) you the money unless you............(mention) them about that accident.10.As soon as Kate..........(pass) the exam, we.........(go) abroad.11 If you (not go) away I'll send for the police. 12 I'll be very angry if he (make) any more mistakes. 13 If he (be) late we'll go without him. 14 She will be absolutely furious if she (hear) about this. 15 If you put on the kettle I (make) the tea. 16 If you give my dog a bone he (bury) it at once. 17 If we leave the car here it (not be) in anybody's way. 18 He'll be late for the train if he (not start) at once. 19 If you come late they (not let) you in. 20 If he (go) on telling lies nobody will believe a word he says.

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