题目

完型填空。 阅读下面短文，掌握大意，然后从A、B、C、D四个选项中选出可以填入空白处的最佳选项。One night, a thief broke into an old man’s house. He  _1  a noise and woke up the old man and his wife. The husband told his  __2_ to be silent, while he said loudly, “My dear, these days thieves are __3__. If they take _4 _   their clothes  and  put them on the table, the people in the room  will fall asleep and  __5_ wake up.When the thief  _6 _ this, he took off his clothes __ 7     and was ready to set out to work. At this __8__, the husban如图，A，B，C是直线上三点，P是直线外一点，AB=BC=1，∠APB=90°，∠BPC=30°，则PA•PC=-47-47．