Do you still remember the city ____ we visited last year ?–You mean Zhengzhou? I know there is a factory____ your mother worked.

Tony, tell me the result of the discussion _______ you had with your dad yesterday. [ ]

Oh, it ________so nice. What beautiful music it is !

What have you decided to buy for your mother _______ Mother’s Day?—Some flowers. [ ]

Mr.Green knows a lot _____Beijing Opera. [ ]