Multiple choice

Directions: Fill in the blank with the correct option.

I waited _____ the train arrived.

  1. till

  2. if

  3. unless

  4. before

  5. since

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sentence implies that a work took place up to the beginning of the other. Preposition 'till' is the correct usage in this case.