―Kate doesn’t look very well. What’s wrong with her?

    ―She has a headache because she ________ too long; She ought to stop work.

A. has been reading      B. had read

C. is reading            D. was reading

―Kate doesn’t look very well. What’s wrong with her?

   ―She has a headache because she ________ too long; She ought to stop work.

       A. has been reading                           B. had read

C. is reading                                D. was reading

— Kate doesn’t look very well. What’s wrong with her?

— She has a headache because she ________ too long; she ought to stop work.

A. has been reading    B. had read   C. is reading          D. was reading

 ―Kate doesn’t look very well. What’s wrong with her?

   ―She has a headache because she ________ too long; She ought to stop work.

A. has been reading                                B. had read

C. is reading                                      D. was reading

 ―Kate doesn’t look very well. What’s wrong with her?

   ―She has a headache because she ________ too long; She ought to stop work.

A. has been reading                                B. had read

C. is reading                                      D. was reading