English is a very important subject． （改为感叹句）
important subject English is!
The government is taking action to improve air quality．（保持句意不变）
The government is taking action to air quality ．
My sister will take part in the Chinese poem contest in a few days．（对划线部分提问）
will your sister take part in the Chinese poem contest？
Lucy practices the violin in the club on Friday afternoons．（改为否定句）
Lucy the violin in the club on Friday afternoons．
The secretary apologized to the manager for making the same mistake again．（保持句意不变）
The secretary to the manager for making the same mistake again．
Keep working hard， and you will achieve success．（保持句意不变）
keep working hard， you will achieve success．