同学们沿笔直的操场一侧插彩旗，每隔4米插一面，一共插了26面，从第1面彩旗到最后一面的距离有______米．

 Although he has been studying abroad,his parents try to keep him ________ of what has happened at

home. [     ]

A. warned        

B. said  

C. reminded        

D. informed