an alarm

an alarm an.alarm. an alarm alarm alarm alarm alarm ALARM alarm The alarm clock is an a____ invention. This is an alarm clock 为什么要用an? an alarm clock 闹钟 alarm也不是形容词啊,怎么修饰clock? dresser,an,clock,the,there,is,on,alarm(.) There is —(a /an )alarm clock on the table . there is an alarm clock on the table.改为复数 把The girl has an alarm clock变为复数形式 have an alarm installed in your business RT~ where’s an alarm clock和where’s the alarm clock这两句话谁对,或者说两句都对?