Please take the medicine three times a day,      it won’t work well.

      A. and      B. but        C. or          D. so

Please take the medicine three times a day, ________ it won't work well.

A. and

B. but

C. or

D. so

Please take the medicine three times a day, ________ it won't work well.

A. and

B. but

C. or

D. so

Please take the medicine three times a day, it won’t work well.

A. or　 B. and　　 C. but　　 D. so