Complete the tired student's morning daydream.

If I ______ a working teleporter, I would never be late for my 8 AM lecture again!

The correct answer is had.

In the second conditional, we use the past simple tense in the "if" clause to talk about an imaginary, unreal, or unlikely situation in the present or future. Since the student doesn't actually have a teleporter, "had" is the correct choice!