1.Before calling ________the Whites,I'd like to call_______Ms.Lynn's
A.at;at B.on;at C.at;on D.on;on
2.Thought the old man is over 100,he______very healthy.
A.gains B.examines C.considers D.continues
3.The three men took turns driving the car,and they drove ______for three days.
A.day and night B.now and then C.over and over
D.more or less