一、 主语变换：戴帽子It，there，结构和认为1. It is of urgent importance to2. It is highly necessary/imperative/urgent for us to3. It is highly likely for us to4. It is universally recognized that5. It is well known that6. It is said/reported/arranged/scheduled7. It is self-evident that8. It goes without saying 9. I think/hold/maintain/suggest/declare/announce/claim 我认为10. They refute/contend/argue/justify himself by saying that 他们反驳道11. I am deeply convinced that 我认为12. I am deeply entren
