Choose the correct word 1.You must / mustn't / needn't have tea. There's coffee too .. 2.You must / mustn't / needn't swim in the sea today . There are aharks. 3.You must / mustn't / needn't wear a suit to the wedding. You can wear casual clothes , if you prefer. 4.Yoy must / mustn't / needn't use a knife and fork . It's rude to eat with your fingers 5.You must / mustn't / needn't turn off your mobile in class. 6.You must / mustn't / needn't use a mobile phone on a plane . It's dangerous. Match the two halves of the first conditional sentences and complete them . 1.You ___ ( not pass ) your exam. 2.We ____ ( not have) a barbecue 3.If he ____ ( invite ) me to the party . 4.If they ____( leave ) now 5.I ____ ( not be ) angry 6.If I ____ ( buy) a new MP3 player a. I ___ ( accept ) b. they ____ ( get) home before 8 o'clock c. If you ____ ( not study ) d. I ___ ( give) you my old one e. if you ___( forget) my brithday f. if it ( rain )