11 7.ue13) complete the dialogue with: must, mustn't, have to, don't have to, don't needto, might. give reasons for your choices.and arevork outu musts your- yourrass.a: hi, john. what are you doing here? b: i want to sign up for an exercise class. mydoctor says i 1) lose some weight.a: you 2) lose a lot. youshould try the aerobics class that i teach.b: i know i 3) do someexercise, but perhaps your aerobics class istoo much for beginners like me.a: you 4) give up so easily, john. try one lesson. you 5)carry on if you don't like it.b: mmm, i'm not sure.a: you never know! you 6) enjoy it! ooooo​

1)  must serious surfers be very brave, love adventure and have lots of energy? 2)  who has experienced the excitement of a ride on top of the waves, they never want to stop? 1)  some even carry pagers which beep when there are weather reports of perfect conditions, don't they? 2) would a surfer's greatest disappointment be missing the opportunity to surf in the best weather conditions? 1) hawaii is where the sport began - the place which most surfers see as their "true home", isn't it? 2) are experienced surfers always in search of the best waves in some totally unspoilt paradise that hardly anyone has heard of? 1) it takes time for a beginner to learn the technique, but during a long hot summer, doesn't it? 2) need you to be a strong swimmer with good balance and plenty of courage to be an expert surfer? 1) who can surf almost anywhere in any weather if vow are wearing a wet suit? 2) you don't need to wear a wet suit in summer, but many surfers keep them on all the time since they can protect you from the hot sun as well as from cold water, do you? 1) can it  take a few weeks or it can take a whole summer for you to learn to catch a wave at the right moment, stand up on your board and stay there? 2) by the age of 17 he was touring with the work 's best surfers, and now, at 23, he practises every day and an even younger generation of surfers study videos of him in action, wasn't he? 1) will simply watching great surfers make you want to try the sport? 2) will you find muscles you never knew you had; you may begin to think you might never get it right, but you'll have a lot of fun?

1) sean said that people did not need tv shows when they could have advertisements. 2) ken said that commercials must not go away of how else people are going to find out about things to buy. 3) pam said that people should not buy things just because famous people are advertising them. 4) cathy said that junk food advertisements should not be banned because it won't stop people from eating it. 5) john said that nobody had the right to tell people what they could and couldn't buy. 6) marsha said that commercials could be creative, informative and very useful. 7) joy said that healthier food had to be more widely advertised. 8) phil said that there was no need to change anything about advertising adding that people would still buy what they want! 9) jeremy said that alcohol advertising must be banned on tv as well as cigarette advertising. 10) jeff said that advertisers might make some advertisements easier to understand. 11) tracey said that because of commercials, people often have to buy things they don't need. 12) gill said that there should be adverts on tv because they give people time to have a break.