He spent ten years writing this He spent ten years in finishing this /he spent ten years doing on this speechHe spent ten years in completing the thesis he spent ten years on writing this
To complete an English paper process is long， need abundant knowledge reserves and access to a large number of relevant data， as well as strong ability of English If it is my personal， it is impossible to finish the Here， I want to thank my thesis guidance teachers zou From the selected topic to paper outline， she gave me good advice and In addition， she spend a lot of time on paper has carried on the guidance of grammar problems， with her help， my thesis to I would also like to thank my roommates and classmates， we do papers together， communicate with each other， encourage each Finally， to thank my family and friends， they shall be my spiritual and material support， make me at ease Near graduation， I sincerely thank you for your teacher and classmates， and my family and friends to complete papers for
