. It is uncertain __ side effect the medicine will bring about, although about two thousand patients have taken it.

  A. that                B. what             C. how              D. whether

It is uncertain _______ side effect the medicine will bring about,although about two thousand patients have taken it.

   A. that         B. what       C.how         D.whether

It is uncertain        side effect the medicine will bring about, although about two thousand patients have taken it．

                   A．that B．what          C．how D．whether

. It is uncertain __ side effect the medicine will bring about, although about two thousand patients have taken it.

  A. that                B. what             C. how              D. whether

. It is uncertain __ side effect the medicine will bring about, although about two thousand patients have taken it.

  A. that                B. what             C. how              D. whether

It is uncertain           side effect the medicine will bring about, although about two thousand patients have taken it.

    A. that                 B. what             C. how              D. whether

 It is uncertain        side effect the medicine will bring about, although about two thousand patients have taken it.

       A．that                       B．whatwww.ks*5u.co                  

C．how                             D．whether

It is uncertain _______ side effect the medicine will bring about, although about two thousand patients have taken it.（ ）

A. that 　　 B. what　　　　 C. how 　　 D. whether

It is uncertain ________ side effect the medicine will bring about, although about two thousand patients have taken it.

A．that 　　　　　　 B．what 　　　　 C．how 　　　　　 D．whether

It is uncertain           side effect the medicine will bring about, although about two thousand patients have taken it.

1. A.
   that
2. B.
   what
3. C.
   how
4. D.
   whether