—John, I didn’t ask for the dictionary. Why _______ on my desk?—Oh, I put it there just now in case you needed while writing your composition.

I apologize for over-speeding, but my wife       a baby and I had to rush her to the hospital.

Computers          in offices and homes since 1970s．

The thief______ when he was stealing a wallet from a woman. 

Traditional folk arts of Tianjin like paper cutting_______at the culture show of the 2010 Shanghai World Expo.