Question

Fill in the gap. He____installing a new program when the light was switched off. A) is B)are C)was D) were

Answer 1

He WAS installing a new program when the light was switched off

Answer 2

C)was          
.............                                     
   

Answer 3

The correct answer is C) was.

The sentence is in the past tense, and the subject is singular (He), so we need a singular past tense verb. "Was" is the past tense of "to be," and it correctly matches the singular subject "He." The other options ("is," "are," "were") are all present tense verbs or plural past tense verbs, and they do not match the tense and subject of the sentence.