Mr. Wu spent a lot of time______（解释）why he was late.
The ______（手术）done by Doctor Ma were all successful.
We have ______（更新鲜的）air in the country than in the city.
My teaching style is ______（相似）to that of most other teachers.
The audience were screaming ______（激动）when they saw the star.
Look! The teacher is sitting ______ (在……中)the children.
What she said has been ______（记录）on the notebook.
---How is Miss King?   ---She is still under ______（治疗）in hospital.
Most of the students in our country are well ______（教育）．
Do you know the saying, “Practice makes ______（完美）”．