Раскройте скобки, употребив глагол-сказуемое в Past Indefinite или Present Perfect.
1. We already (to learn) 1000 English words. 2. They (to come) to the theatre at 7 o’clock. 3. Why are you reading the letter? – I (to read) it. 4. No scientist (to do) so much for the development of Russian science as M.Lomonosov. 5. I (not to miss) any lectures this month. 6. The sun (to come) out a moment ago. 7. I (not to sleep) since that night.