III. Put the correct form of the verb in brackets.
21.If there (be)……no wars , people ( become)………happy.
22. If today ( be)……….Sunday, we ( have ) ………. a lot of fun.
23.The earth is seriously polluted. I wish it ( not be) ……. polluted like that.
24.What …………..you ( do) ……..if you ( see) ……..a UFO ?
25.If you ( practice) ……..English with a native speaker, your pronunciation ( improve) …….
26.We ( save) ……………a lot of natural resources if we ( use) …….solar energy.
27. If I ( be ) ……….you, I ( not accept)……. his invitation.
28. What a pity she is not here. If she ( be) …..here, we ( have) ….. lots of fun.
29. I may be free tonight. If I ( be) ……. free tonight, I ( come) ….. to see you.
30.John wishes he ( have) ……….a good job in the future.
31.It’s too cloudy for the picnic today. I wish the sun ( shine)…….. right now.