Read aloud paragraphs 4 to 8 until you have learned them by heart. Then try to complete the passage from memory:(仅选择本题号对应横线处的正确答案,例:第一题只选第一个空的对应答案) It has been replaced by dead-bolt locks, security chains, ______ (1) alarm systems and trip wires ________ (2) a police station or private guard firm. Many ________ (3) families have sliding glass doors on their patios, with steel bars elegantly _________ (4) so no one can pry the doors open.It is not __________ (5), in the most pleasant of homes, to see pasted on the windows small notices ___________ (6) that the premises are under __________ (7) by this security force or that guard company.The lock is the new ________ (8) of America. Indeed, a recent public-service advertisement by a large insurance company ________ (9) not charts showing how much at risk we are, but a picture of a child's bicycle with the now-usual padlock ___________ (10) it.