Fill in the blank with the most appropriate word. A: Why are you late? B: I ________ on the wrong bus.

The correct answer is B. got.

The sentence “I got on the wrong bus” is in the past tense, so the verb in the blank should also be in the past tense. The other options are not in the past tense.

A. get is in the present tense.
C. am getting is in the present progressive tense.
D. will get is in the future tense.