Упражнение 534: Решение

Вот решение упражнения 534. Упражнение 534 Раскройте скобки, употребляя требующуюся форму инфинитива. 1. She must **be** mad if she thinks he is going to lend her any more money. 2. They must **have been** upset when they heard the news. 3. You must **come** and **visit** us soon. It would be so nice to see you again. 4. It's the third time he's been playing the piano today. He must really **be enjoying** it. 5. Oh, look how white and clean everything is! It must **have snowed** at night. 6. Oh, you are all in snow, you look like a snowman. It must **have snowed** heavily. 7. Look, what huge snowdrifts there are everywhere, and the path is covered with knee-deep snow. It must **have been snowing** for several hours already. 8. You look fresh! You must **have had** a good sleep at night. 9. You look very tired. You must **have had** a good sleep at night. 10. He knows mathematics much better than he did last year. He must **have worked** a lot in summer. 11. Your mathematics is very poor. You must **work** on it in summer. 12. Where is Peter? — Oh, he must **be reading** in the library. He is getting ready for a very difficult exam. 13. You must **have been studying** English for several years already. Your language is excellent.