I stopped by the bank. I must change some money.啥意思？！~

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? I stopped by the bank. I must change some money.啥意思？！~ By the time I got home,the rain ____.A.was stoppBy the time I got home,the rain ____.A.was stopped B.was stoppingC.had been stopped C.had stoppedhad stopped是D，打错了 I was stopped by a traffic policeman for the speed at driving by me becase was too high When I come into the classroom the stuents stopped( )(talk) 我希望这雨将在明天中午前停下来 I hope the rain will have stopped by tomorrow noon.我不明我希望这雨将在明天中午前停下来 I hope the rain will have stopped by tomorrow noon.我不明白为什么是by tomorrow noon 而不 by the time he reached the dentist ,the pain in his tooth ____A stopped B had stopped C has stoppeD has been stopped 选择哪个?为什么?不是现在完成的被动吗？疼痛不是被止吗？ The man was stopped by the traffic___for speeding.A：police B:policeman the sun was ----------by the clouds and it became darka,keptb,preventedc,hiddend,stopped 1.I was deelpy ()(impress) by his speech2.I ()(not take) any food since last Sunday3.As soon as he saw me ,he stopped()(speak) to me4.I don 't know the ()(different) between these two words I never stopped waiting. I never stopped waiting. ring做动词能用完成时态么the telephone ___,but by the time I entered the room,it stopped.选was ringing.为什么不能填had rung.ring不能延续? he played so well that all the passers--by stopped to listen to the music这里BY ban i think that ( ) young have a promising future Aa Ban C the police和policemenThe man was stopped by the traffic__for speeding.A police B policemen为什么? The telephone _______,but by the time I got indoors,it stopped.A.had rung B.was ringing C.rings D.has rung该怎么解释为什么不能选A?