【题目】My father was so glad to meet his old friend again.You see, they________with each other for nearly 30 years.
A.lost contact
B.had lost contact
C.had been out of contact
D.has been out of contact

【答案】C
【解析】根据句中出现的时间状语for nearly 30years可知，要用完成时。又因失去联系这一动作延续到他们这次见面之前，所以要用过去完成时。由于lose contact不能延续，故C项正确。