1. It's five o'clock. The meeting could already come to an end; let's wait a little bit, he may soon come. 2. Peter must be ill, otherwise he'd be in the theater, he never comes at the last moment. 3. Can't be that she forgot about the concert, it's not like her at all. 4. I do not expect it today; but who knows, maybe he will come. 5. "I'd like to know where she got "Three comrades" Remarque?". — "She could take it in our library". — "Can't be, so she took her to our library: Semenova yesterday took the last copy". — "Well, she must have took it to another library." 6. "Where's Paul?" — "I don't know, he might have gone to the Philharmonic". — "Well, that's not very kind of him; he could take the ticket and for me." — "Hey, look on the table something is, it must have left you a ticket and a note". 7. Can not be that she was here yesterday. If she were here, she would have left me a note. 8. Do not return until the book to the library; you may need it for a report. 9. Can I get your book? 10. Here you can use present progressive? 11. He said that the report had already and he can read it tomorrow at the meeting. 12. "He must have left already". — "Can't be, so he left without seeing me." 13. "Where Is Maria?" "She must be still asleep." 14. You must be mistaken, on the twenty-fifth page there are no words.
1. Now the whole world will have to believe that mankind is destined to inhabit, if not all, many planets in the solar system.2. If someone had said this fifty years ago, he would have answered that about it and think it is impossible. 3. The skeptics who said that this cannot be, we must acknowledge that we are destined to be witnesses of the interplanetary flights. 4. In order to launch the rocket into interplanetary space, scientists had to make precise calculations to know where to aim the rocket. They decided that it must go in the vicinity of the moon. 5. I believe that the Moon may be, will serve as a base for interplanetary flights. 6. Scientists think that the moon must be no atmosphere. 7. The difficulties we have to overcome in order to create a passenger interplanetary missiles, very high. But we will surely overcome them.
