________ I admit that there are problems, I don’t agree that they can’t be solved.

________ I admit that there are problems, I don’t agree that they can’t be solved

1. A.
   When
2. B.
   As
3. C.
   While
4. D.
   But

 ________ I admit that there are problems, I don’t agree that they can’t be solved.

A．When          B．As              C．While       D．But

_______ I admit that there are problems; I don’t agree that they can’t be solved.

A．Since               B．Unless             C．While              D．If

         I admit that there are problems, I don’t agree that they can’t be solved.

A. When           B. While        C. Until          D. As

________ I admit that there are problems, I don’t agree that they can’t be solved.

_________ I admit that there are problems, I don’t agree that they can not be solved．

1. A.
   Since
2. B.
   As
3. C.
   While
4. D.
   Unless

_______ I admit that there are problems, I don’t agree that they can not be solved.

   A. Since            B. As              C. While            D. Unless