who saw it ( ) at that time. A.happen; B.happened; C.happens

This story ____a long time ago A.happened B.happen who was in the classroom at that time?A.Yes,it's Jack B.None a women saw it ___when she was walking pass.填happen,happened was__in 1950__this happened?A)it,when B)that,that C)it,that Who's that at the door?____ is the postman.A.She B.This C.It When does something happen if it happens "finally"?A.at the a terrible thing is (happen) A.happen B.happened C.happening What yesterday?a.happens b.happened 英语语法问题It happened that I saw a traffic accident happened whe What ____ you yesterday A happen B happen to C happened to D He asked his father ( ).A.where it happens B.what was happen something interesting happening/happen/happened/happens