Have you ever wondered ______ there are so many natural disasters across the world in 2010?

     A. which it is that                      B. what is it that    

C. how it is that                         D. why it is that

Have you ever wondered ______ there are so many natural disasters across the world in 2010?

1. A.
   which it is that
2. B.
   what is it that
3. C.
   how it is that
4. D.
   why it is that

Have you ever wondered ______ there are so many natural disasters across the world in 2010?

     A. which it is that                      B. what is it that    

C. how it is that                         D. why it is that

Have you ever wondered ______ there are so many natural disasters across the world in 2010?

 Have you ever wondered ______ there are so many natural disasters across the world in 2010?

       A．which it is that                                                      B．what is it that

       C．how it is that                            D．why it is that