1.  .I don't know which one is right.

2.  Can you explain that which one is right?

3.  I want to know which one is right and why.

4.  In the English lesson, my teacher said that the sentence " He is taller tha I" is right.

5.  Which is right?

6.  I am not understand which is right and why .

7.  I want to know which is right and why.

8.  I don't know who is right and why.

9.  But there's a man haven't this right, he is on tenterhooks every day.

10.  The teacher said: "You were right.