单句改错When the boy came into the classroom,he found the others

When his teacher came into the classroom ,he happened ______ when the teach came into the classroom.she（）a boy I found the boy < > when i walked into the classroom括号里填draw When I came into the classroom,I found Tom____ (do)his homew When the teacher came into the classroom,the students _____( When the teacher came into the classroom,the students ______ When the teacher came into the classroom, the students ____ 1.When the students came into the classroom,the teacher ( ) when the teacher came into the classroom,the students were ( When the teacher came into the classroom, the students _____ When the teacher came into the classroom, the students   When the teacher came into the classroom, the students stopp