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

Please tell me ________ for the meeting yesterday．—Sorry．The traffic was bad．

I often laugh when I see my grandma learning pop songs. But she says，“One is never _____ old to learn.’’

Only when be possible to sign the papers.

Is the woman walkedpast just now your teacher-Yes. She teaches English.