--- Must I stay at home, Mum?--- No, you_____

 ---Could you please come to the museum with me this afternoon?---Sorry, I ______ . I have to take a piano lesson at 2 pm.

Everybody there was _______ by the _______ story.

— I regret to say that I          have shouted at you the other day．— Forget it． I was a bit out of control myself．  

. (2010·江西名校模拟) —I’ve heard they went skiing in the mountains last winter.                           —It ______ true because there was so little snow there then.