—Where ______ your food?—I only have two hamburgers. They ____ on the table. 

 — Oliver looks a bit upset, did you tell him the bad news?— Yes, but I _____ him after his birthday party.

My cell-phone  has disappeared. Who       have taken it away?

________ he is a child, ______ he knows much about the computer.

Living in a fast-paced world, we                  get left behind if we stop learning.