А. Вставьте подходящую форму инфинитива в последующие предложения:Не speaks English well.

А. Воткните подходящую 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)