_______ in a long queue, we waited for the store toopen to buy a New iPad .

t you tired of practicing playing the piano dayafter day—,I enjoy every minute of it.

Sales director is a position ________ communication ability is just as important as sales skills.(2012·重庆)

Paper money was in_______use in Chinawhen Marco Polo visitedthe country in________thirteenth century.

Must I return the book tomorrow?—No, you ________.You can keep it for three days.