Вставьте глаголы can, should, have to, to be to, need, to be allowed to в нужной форме: 1. he …go to the far east on business. 2. when …we …visit the laboratories of the institute? 3. he …investigate a series of accidents that have occurred in the locality during the last three months. 4. we …find a safe place for the pictures. 5. i shall …take a local train. 6. you …follow all the important scientific researches in your field. 7. he…use the mobile equipment. 8. you …keep your activities in secret. 9. you …see this old film in one cinema only. 10. the talks …be attended by the representatives of fifteen european countries.