the telephone was ringing ,but by the time I got indoors,it stopped.为什么这个句子中,是it stopped 而不是表达为it had stopped?

The telephone was busy.翻译 the telephone was busy同义句The telephone _______ _______ the first telephone was invented in()kkkkk! The telephone was rang 是被动语态? The door bell ＿＿when I was leaving.A.am telephone B.telephone C.was telephone D.telephoned 为什么是The telephone was invented in1876而不是a telephone was invented in1876 The telephone was invented in the nineteenth c___. The telephone rang ______ I was in the garden. Nobody answered the telephone.（写同意句）There was ________ __________ on the telephone. What happened while Linda was on the telephone什么意思 What happened while Linda was on the telephone I was reading a book at home.the telephone rang. he was just falling ( )when the telephone rang while i was ate a meal the telephone is ranging. The telephone was invented （）1876（）an American I wonder when the telephone was ____ 中文 Tom invented the telephone和The telephone was invented by Tom?第二句为什么要加was,第一句不用? what happend while Linda was on the telephone 中was on the phone讲解一下好吗