Choose the correct form.1. you mustn’t/needn’t place a heavy emphasis on broadening membership and constructing a wide electoral base. 2. your decision mustn’t/haven’t to be the result of your preferences, but of the necessity.3. you mustn’t/don’t need to look through all these documents. here is a letter from mr. b., he is ready to help you.4. you mustn’t/don’t have to write to the committee, they have just phoned. but we must/have to send our representative there.5. the law of a country mustn’t/needn’t permit such parties to seize power and overthrow the existing constitutional structure. 6. the government mustn’t/haven’t got to invent any new laws, the existing laws are very effective.7. – what sort of advertising campaign are you up to? television? – well, it mustn’t/needn’t be television – it’s too expensive. but it must/need to be efficient.8. this experience is very valuable. you must/have to study it carefully and mustn’t/needn’t ignore it.9. you needn’t have refused/didn’t need to refuse to become the leader of the political party. i know several persons who would like to support you.10. the voters needn’t have checked/didn’t need to check all documents as they found what they were looking for in the first one.11. you needn’t have controlled /didn’t need to control a mass organisation through patronage and the distribution of favours, you only wasted your time and money.12. the campaign was adequate, so she needn’t have worried/didn’t need to worry about the results.