Why were you so late for work today— ____ to the office was not very easy thismorning because of the traffic

I couldn’t get any tickets for the basketball game.— ________________

I had to catch my flight. That was ________ I left Tom’s party so early yesterday.

I wonder _________ makes the video Gangnam Style so popular. ——The unique dance moves and funny horse riding scenes.

Tommy, you can never let others know what I have told you today.—Don’t worry. I will keep the .