4 Rearrange the words and write the sentences. 1 roof / mend / the / must/We. 2 washing up/this / do / the / evening / have to/1. 3 country/They/the/ must / leave / today. 4 have to /so/to/ don't / You/food/buy/ much. 5 talk/mustn't / You / loudly / so. 6 homework/now / finish/their / They / have to.