The teacher stressed again that the students should not _________ any important details        while retelling the story.

When I opened the door, I found my father sitting in his chair, completely _____ in the humorous stories he was reading.

－ I came all the way to inform you of the time and place of the meeting.－You could have __________ yourself the trouble by calling me. 

 He began to take political science ________ only when he left school.(2013·湖北)

The school often ______ many books and magazines for the teachers to refer to.