Have you been to the Great Wall?-Perhaps not in my memory. _______ , it might have been during my early childhood.
. “Don’t you believe me?” “______, I’ll believe _______ you say.”
_____ do you visit your teacher who taught you years ago? —Once a year.[ ]
His parents live ______ in a small house, but they don’t feel ..
Were you at home at 9:00 pm yesterday?— Yes, I for a call from Paris at that time.