Fll in gaps. use must or have to in the positive or negative form. 1.if you want to make progress, regularly 2. this window. it may fall. 2. more vegetables and fruit. they are good for me

1.if you want to make progress,you must eork regularly. 2.you musn't open this window.it may fall. 3.i have to eat more vegetables and fruit.they are good for me. you mustn't iterrupt your teacher. my grandmother hasn't work.

It is necessary to conduct research and analysis of the tourism industry in order to better manage its development. removal of restrictions on entry into the country contributes to the development of tourism. the state policy in the field of tourism plays a significant role in the development of the necessary infrastructure. government engaged at various levels of daily regulation of the tourism industry. licensing is an integral part of such regulation. the activities of all companies and businesses operating in the field of tourism should be controlled by the state. direct and indirect investments in the development of tourism should be shared so that the economic benefits are distributed evenly across all regions. tourism must be environmentally sound, its impact on the environment have to be taken into account in the preparation of long-term plans.