1. In general， I don’t agree with...

2. In my opinion， this point of view doesn’t hold water.

3. The chief reason why...， is that...

4. There is no doubt that...

5. It is not true that...

6. It can be easily denied that...

7. We have no reason to believe that...

8. What is more serious is that...

9. But it is a pity that...

10. Besides， we should not neglect that...

11. But the problem is not so simple. Therefore....

12. Others may find this to be true， but I believe that...