Перепишите следующие предложения, подчеркните в каждом из них модальный глагол или его эквивалент; предложения переведите на русский язык. 1 .Fertilizers may be supplied to plants together with water.

2. The operator has to press a button on the control panel to make the water flow into the take-off canal.

3.The water that comes to the field must get to the roots of every plant..

4. The ecological problem can and must be solved by the efforts of all countries that is possible only in the conditions of peace and detente.

5.The planners have to investigate the effects of working on crop yields: run-off, erosion, siltation, infiltration, and the like.

6.The stationary watering pipe-lines are to be made of asbestos cement.