__An accident happened at the street corner __I think the police ___ question everyone here.A.is going to B.are going to C.was going to D.were going to选哪个?

when did the accident happen a traffic accident ___(happen)to him when did the accident happen?怎麼回答? When did the car accident happen?(同义句） How did the accident happen?改同义句RT Did you know how the accident _______(happen) that afternoon? I saw the traffic accident ____(happen)yesterday ()()the heavy rain () （正是.才.）made the accident happen I saw an accident ___(happen) on the road yesterday. accidents happen为什么accident要加s 以上是单句 it was ____(please) to see the accident happen yesterday The accident （ ）me yesterday.填 happen 的适当形式 it was ____(please) to see the accident happen yesterday Did you see the accident happenDid you see the accident ________ 是happen 还是happened,为什么 some of the students saw this accident happen yesterday.happen为什么不用过去时happened yesterday lucy saw the accident _(happen)in the street为什么happen是动词原型 When () the accident ()?A.was,happen B.did;happen C.is;happen D.was;happened 选B,为什么? I saw an accident happen on my way home 改句子改成：An accident ___ ___ ___ happen on my way home.（三个空格）