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填空题
An alarm system frightens away the burglars.____
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解析：
由题干关键词“alarm system”可定位到A段。这里提到，虽然家庭防盗系统并不能阻止盗贼进屋，但它有强大的威慑作用，使盗贼有所顾忌，故匹配段落为A段。
由题干关键词“alarm system”可定位到A段。这里提到，虽然家庭防盗系统并不能阻止盗贼进屋，但它有强大的威慑作用，使盗贼有所顾忌，故匹配段落为A段。
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