—Now let’s move on to another topic.Do you follow me?

—_______,Professor.

A.No,I am not                                                 B.Yes,I will

C.No,I haven’t                                                 D.Yes,perfectly

—Now let’s move on to another topic. Do you follow me? —__________, Professor.

A. No, I am not   B. Yes，I will  C. No, I haven’t   D. Yes, perfectly

 —Now let’s move on to another topic.Do you follow me?

—_______,Professor.

A.No,I am not                           B.Yes,I will

C.No,I haven’t                         D.Yes,perfectly

——Now let's move on to another topic. Do you follow me?

——________, Professor.

1. A.
   No, I am not
2. B.
   Yes, I will
3. C.
   No, I haven't
4. D.
   Yes, perfectly