1. Perhaps I will question why...

　　2. There is a certain amount of truth in this， but we still have a problem with regard to...

　　3. Though we are in basic agreement with...， but...

　　4. What seems to be the trouble is...

　　5. Yet differences will be found，that’s why I feel that...

　　6. It would be reasonable to take the view that...，but it would be foolish to claim that...

　　7. There is in fact no reason for us to believe that...

　　8. What these people fail to consider is that...

　　9. It is one thing to insist that...，it is quite another to show that...

　　10. Wonderful as A is， however，it has its own disadvantages too.

　　11. The advantages of B are much greater than A.

　　12. As advantage sounds ridiculous when B，s advantages are taken into consideration.