Have you ever argued ________ your parents? [ ]

Do you know _________ an “o” and _________ “u” in the word “computer”?

What does the fresh juice contain ?— of the juice orange . It’s very pure .

______ minutes do you ride to school? — About twenty minutes. [ ]

Excuse me, is there ________ book by Mo Yan?—Yes. It’s on _________ bookshelf over there.