John knocked at the door for nearly five minutes ____his wife opened ita.when b.before为什么不能选when

John knocked at the door for nearly five minutes ____his wife opened ita.when b.before为什么不能选when 是knocked at the door还是knocked on the door knocked at John knocked at the door for nearly five minutes ____his wife opened it.A before B until选的是A,为什么B不对?详细才给分! knock 短语The little boy run for the football and ___a man standing there.A.knocked down B.knocked at C.knocked into D.knocked the man knocked l_ at the door now. She went d_____to see who knocked at the door. 18. He knocked at the door _________ no one answered. ①John had an a____:he's been knocked down by a car.②the football player was Paul's h_____when hewas at school.③the old road has now been c___ up since the highway was open. I () my brother when someone knocked at the doorI () (telephone)my brother when someone knocked at the door John knocked at the door for nearly five minutes ____his wife opened it. A before B until 选的是AJohn knocked at the door for nearly five minutes ____his wife opened it.A before B until选的是A,为什么B不对? knoced at 和knocked I heard someone ____(knocking/knocked)at the door just now.那用knocked也满足hear加从句呀？ who was knocking at the door just now?还是who knocked at the door just now? 有个选择题 大家帮帮忙 Just after going to bed,------.Just after going to bed,------.A. John heard someone knocking at the door. B. someone was knocking at the door C.the door was knocked at by someone D. there was a knock on the doorples te 请问 ：The man knocked at the door.the door是宾语吗?这个句子中knocked at the door 是谓语,还是knocked at 是谓语,the door 做宾语 John is h______ dinner at the table. The boy ___ the ball and ____ a man.A.run to,knocked into B.ran to,knocked upon C.ran for ,knocked into D.ran for,knocked at选哪个?为什么?请翻译.