Over the years he has accumulated ( ) on this subject.

He has been exposed to a good business over the years on the This place has changed a lot over the years. A book was written on the subject.He has written a book on t 英语句子改错He has worked on this farm for two years when he was a your look has changed over the years English has changed a lot over the years and still goes on c 英语翻译For over four years,KISTCM has been a subject of experim 改错:He has been to Beijing for over two years He has worked here for over three years. This is the best book ____ on the subject 英语翻译The accumulated amount of what government has borrowed t your dad has done many great things over the years