Stop smoking, Joe! You _____ yourself if you keep on doing it like that!
I ________ a bag. ________ a new bag on the desk.
While Mary ___ a letter, the children were playing outside.
---________--- K-E-Y, key.
He never____learning English.That was why he was successful at last.
I found ______ not very difficult to keep away from the A/H1N1 Flu.