I have many friends, _______ some are businessmen.
-----Are you sure you won’t come for a drink with us? -----______, if you insist(坚持).
Nancy invited Tom and Ann to dinner, but _____ of them came.
I ordered ______book some days ago. ______ book has arrived.
This is not a match. We are playing chess just for _______.
My father began to work ______ a bus driver when he was 20 years old.