А. Вставьте соответствующую форму инфинитива в следующие предложения: Не speaks English well. Не must have studied it for a long time. They are laughing. They must be having a good time. 1. Nobody answered the phone. They must out. (go) 2. The line is busy. He must ______ the phone, (use) 3. You made a long distance call. It must expensive. (be) 4. I need more money. I should my job. (change) 5. I got the wrong number. I may incorrectly. (dial) 6. What is he doing? He should ___ the report. (type) 7. Mr Smith didn't return my call. He might busy. (be) 8. I couldn't make my call. I must to put a coin at the slot. (forget) 9. There is somebody in the office. It might _______Miss Cooper, (be) 10. You've given me a letter. Shall I ______________ it? (send) 11. He is out. He must _______his dinner, (have) 12. There were five of them. It must _______ one of them.(be)