Multiple choice

Directions: Fill in the blank with the most appropriate conjunction.

You will not be allowed to board the train ___________ you have reserved seats.

  1. till

  2. until

  3. less

  4. unless

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

Case of subordinative conjunction. 'Unless' means 'if not, except when'. Hence, option 4 is correct.