根据提示填空（每空一词）
They were shopping at that time. (改为否定句)
They ____ ____ at that time.

根据提示填空（每空一词）
玛丽正在画画时，格林先生进来了。
Mary was drawing a picture ____ Mr. Green ____ in.

根据提示填空（每空一词）
昨天下雨时他们正在干什么？
What ____ they ____ while it ____ ____yesterday?

根据提示填空（每空一词）
昨天九点的时候我叔叔正在房间里看书。
My uncle ____ ____ books in the room at nine o’clock yesterday.

根据提示填空（每空一词）
—What were you doing when we were playing basketball yesterday afternoon?
—I ____ ____ (clean) the classroom.

根据提示填空（每空一词）
Lucy was ____ (smile) at me when I saw her.

根据提示填空（每空一词）
当学校篮球赛开始的时候，凯特还在前往学校的路上。
When the school basketball competition started, Kate ____ still making her____ to school.

Some students were playing hide-and-seek ____ others were playing basketball.

She was trying her best to fight with the robber(抢劫者)，____ the policeman came.

An alien landed ____ they were talking about UFO.