Change the given statement into passive voice. 

Kishore taught us English.

In the active voice, the subject performs the action. The given statement "Kishore taught us English" is in active voice format. Here, the subject of the statement Kishore is the doer of the action "taught". We need to convert it into the passive voice format where the subject receives the action in the name of the verb. In the passive voice, the subject will be shown as affected by the verb. Here, English is the object which has to be made the subject in the passive voice format. All the options use "English" as the subject. Option B is in the present tense, and Option C is in the past continuous tense. Option D is in the past perfect tense. Hence, all these options can be eliminated. Option A is the correct answer.