___ entered the classroom when the bell rang.

A.We hardly had   B. Hardly had we   C.Hardly we had   D.Had we hardly

________ entered the classroom ________ the bell rang.

A. We hardly had; before                    B. Hardly had we; when

C. Hardly had we; than                    D. Hardly did we; when

________ entered the classroom _________ the bell rang.

  A. We hardly had, before                  B. Hardly had we, when

  C. Hardly had we, than                    D. Hardly did we, when