IV. Раскрыть скобки и употребить одно из времен Continuous. 1. I (to talk) over the telephone, when she entered the room. 2. They (to watch) TV while their mother (to cook) dinner. 3. Where is the teacher? – He (to ask) questions now. 4. The engineers (to test) a new machine the whole day tomorrow. 5. Listen! Someone (to knock) at the door.

1.was talking
2.were watching, was cooking
3.is asking
4.are testing
5.is knocking