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.