III. Открыть скобки и употребить Past Indefinite или Present Perfect.

1. They already (to arrive) at the station.
2. He (to set) up his own business last year.
3. We never (to see) the Queen.
4. Recently the plant (to produce) a new model of cars.
5. The examination just (to begin).
6. Last year they (to invent) a new device.
7. This month the students (to attend) all classes.
8. Thomas Edison (to make) the first machine with moving pictures in 1891.
9. Last term we (to study) general educational subjects.
10. I (to begin) already testing the engine.