1. The teacher was giving the lesson. The lights went out. A. The lights went out as soon as the teacher started giving the lesson. B. If the teacher had been giving the lesson, the lights wouldn't have gone out. C. The teacher was giving the lesson, so the lights went out. D. While the teacher was giving the lesson, the lights went out. 2. ''Where are you going on your holidays?'' I asked them. A. I asked them where they are going on their holidays. B. I asked them where are they going on their holidays. C. I asked them where they were going on their holidays. D. I asked them where were they going on their holidays.