Раскройте скобки, употребляя глаголы в Present Indefinite, Present Continuous, Past Indefinite, Future Indefinite.

Раскройте скобки, употребляя глаголы в Present Indefinite, Present Continuous, Past Indefinite, Future Indefinite. 1. When …you (to prolong) the duration of guarantee period? 2. Who (to test) the new equipment now? 3. We (to hope) this transaction (to produce) a profit. 4. They (to create) a network of agents in this firm last month. 5. They always (to give) their partners a square deal. 6. … you still (to cooperate) with them. 7. They (to remedy) the defects after the tests. 8. When … you (to plan) to place the order with this firm? 9. How often … the partners (to break) contractual obligations? 10. We (to enclose) new samples of our product with this letter. 11. We (to improve) the performance of our equipment a month ago. 12. We are sure you (to accept) our proposal. 13. These goods (to be) in great demand last year but they (not to be) now. 14. …you (to settle) the problem with partners at negotiations? 15. We sometimes (to get) competent lawyers in. 16. I (to get) the manager on phone only late at night. 17. Who (to advise) you to take such a decision? 18. I (not to operate) a computer at the moment. I (to have) a rest. 19. …you (to be) free in an hour?