【推荐1】—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

【推荐2】—I called you yesterday afternoon. But you didn’t answer me.
—Yesterday afternoon? Oh. I _________ in Olympic Sports Center.

A．am swimming

B．swim

C．was swimming

D．will swim

【推荐3】—I went to the library yesterday afternoon, but I didn’t see you there.
—Oh! I ________ for my final exam in my dormitory the whole afternoon yesterday.

A．prepared

B．would prepare

C．was preparing

D．had prepared