Exercise 4: Rewrite the following sentences. 1/ It isn't necessary to shout.  You ............................................................................................ 2/ It wasn't necessary for them to call for help after all. They ................................................. 3/ There was no need for you to have gone to all that trouble.  You .......................................... 4/ Your house needs to be redecorated.  Your house.................................................................... 5/ It's possible that he didn't get my letter.  He might ................................................................. 6/ You needn't have bought it for me.  It wasn't ........................................................................... 7/ I'm absolutely sure that they didn't go out in that weather.  They can't ................................................................................................................................... 8/ "Why didn't you tell me about it yesterday ?"  You should .................................................... 9/ I'm sure she didn't do it on purpose.  She can't.................................................................. 10/ It's possible that your car was stolen.  Your car ................................................................ 11/ Perhaps Lan went to London.  Lan might....................................................................... 12/ It's a pity that you didn't go to see that film at the cinema last night.  You should .................................................................................................................................. 13/ "It was very careless of you to let the door open last night"  You shouldn't............................................................................................................................... 14/ Perhaps Manh is repairing his bike now.  Manh may........................................................ 15/ Perhaps they have two big houses in the suburb.  They ........................................................ 16/ You ought to have reminded me about the meeting yesterday.  Why didn't ...................................................................................................................................