---How much should I pay for the food, Sir? --- It costs_______. The food is free on our ship. _______ needs to pay for it.
Harry Potter is so interesting a book that lots of teenagers like to read _
— Could you please pass me the book?
—Merry Christmas! —_______.
The policeman caught the thief ______ has stolen Mr. Li’s computer.
—Miss Gao, I am feeling bored. Would you mind my ________ here? —You had better not, for smoking is forbidden in public now.