--- ________ the class done most of the work? --- Yes, but the rest ___________ rather difficult.
I am going to the post office. Do you have any letter _________?
His daughter has ___________ the young politician for five years.
He has been _______ for three weeks. We’d better find another person to fill his place.
. Is this school _______ some German friends visited last week?
I have to turn to my teacher for help, because this math problem is rather difficult______.