______ your father a policeman twenty years ago?
—Which of the caps will you take?—I’ll take _______,one for my father ,the other for my brother.
. —Did you get there by ______ bike?—No, I took ______ taxi.
Why don’t you ________?A.write down it B.write down C.write it down
I ________ the living room.Look,it is clean.A.clean B.am cleaning C.have cleaned
The children ________ at the table when their mother cooked in the kitchen.A.wait B.are waiting C.were waiting