问题补充：
1. He had suffered from headaches for a long time, so the doctor r him to take a vacation.
2. To do this analysis, I (咨询) several experienced experts.
3. At the same time, he a to invent a new technique to reduce the cost.
4. One frequent problem is that most people dare not challenge the r (常规).
5. The woman was a of stealing in a grocery, but she insisted she was innocent.
6. The stars look as if they were still, but in reality they are in (一直) movement.
答案：
解析： 略
