Exercise 2. Put the verbs in brackets into the Past Simple tense. 1. Yesterday they ( to send ) messages and (to share ) files across computer networks. 2. The second trend ( to concern ) the nature of software applications. 3. Installing new links ( to take ) up to two months. 4. The network operators ( to implement ) this technology last week. 5. This system ( not / to handle ) real-time rating, making it difficult to launch other valueadded services. 6. There ( to be ) several competing proposals on how to achieve the most appropriatetechnology around the world. 7. Many operators ( to express ) dissatisfaction with the current price levels last month. 8. The Magnafox Communication Integrator ( to route ) out-going calls through the mostcost-effective medium, based on tariff data stored in its memory.