根据短文内容，选择正确答案Many people like traveling during their vacation. They go to mountains, seaside, or forests. Some people like history so they like to visit old castles (城堡
Why didn't you tell me there was no meeting today? I________ all the way here through the heavy snow. A. needn't have driven B. can't have driven C. mustn't have driven
，在图3中，
，在图4中，
，…，在图n中，
，则从图2到图n中，共有___________张图，△DEF的面积小于
.
