—Why do children hang stockings over the fireplace for presents?
—As the story goes, to help a poor family, Father Christmas threw a small bag of gold down the chimney and it fell into a stocking that ___________up to dry over the fireplace.

A．hung	B．had hung
C．was hanging	D．was hanged

—Did any signs come up before the earthquake?
—Yes. Unusual things  all those days. For example, a number of animals got out their homes.

A．happening	B．were happening
C．has happened	D．had happened

— Why are you always yawning, Kathy?
—I ______ all night reading Steve Jobs. That’s a fantastic book!

A．stayed up	B．am staying up
C．stay up	D．will stay up