Ex.1. Put the verbs in the Present, Past or Future Continuous.

Ex.1. Put the verbs in the Present, Past or Future Continuous. 1. Last year Russian explorers (to conduct) a wide program of research in Antarctica. Aircraft (to take part) in this research work. 2. Our research institute (to work) on this problem during the past two years. 3. He (to test) a new machine when they entered the laboratory. 4. As it (to rain) in the morning yesterday we did not go to the country.5. We (to wait) for you at the library at five tomorrow. 6. My friend (to work) on his thesis from 1988 to 1991.Sandra: Where is Tim going to meet us?