If we (know) ______ the basic principles, we should have controlled the process even better.
举一反三
- If we had known the basic principles，we should have controlled the process ever better（） A: 如果我们认识这些基本理论，我们就能更好的控制这个程序了。 B: 假如我们了解这些基本原理，我们应该早点控制这个过程。 C: 如果我们见过这些基本原理，那么我们必须更早一点控制这个程序的使用。 D: 如果我们早知道这些基本原理，我们就会更好的控制这个程序了。
- In order to live longer, _____. A: we have to try to be on a diet B: we should keep in high spirits C: we should try to do more exercise D: we should postpone the process of aging
- Should we __________ those who have betrayed us? I think we'd better forgive but not forget.
- You _________ than to make those embarrassing remarks. A: should have been know better B: should have known better C: should have know better D: shouldn’t have known better
- Should we take revenge __________ those who have betrayed us? I think we’d better forgive but not forget.