Вставьте модальные глаголы may, can, must, need.1. There are no buses

Воткните модальные глаголы may, can, must, need.1. There are no buses or taxis, so we ... walk.2. I.. not go out today: it is too cold3. ... I use your telephone? 4. I ... ask the chief to put off my report: it is impossible to do anything in such a short time! 5. What time is it? It be about 6 o39;clock, but I am not sure. 6. We .. not live without food and water.