| Acknowledgements | 第5-6页 |
| Abstract in Chinese | 第6-9页 |
| Abstract in English | 第9-12页 |
| Chapter 1 Introduction | 第15-19页 |
| 1.1 Research Background | 第15-16页 |
| 1.2 Purpose and Significance of the Study | 第16-17页 |
| 1.3 Organization of the Thesis | 第17-19页 |
| Chapter 2 Theoretical Framework and Literature Review | 第19-45页 |
| 2.1 Theoretical Framework | 第19-33页 |
| 2.1.1 Vocabulary Knowledge | 第20-24页 |
| 2.1.2 Collocation Knowledge | 第24-31页 |
| 2.1.3 Significance of Collocational Knowledge | 第31-33页 |
| 2.2 Acquisition of L2 Collocations | 第33-38页 |
| 2.2.1 Input Enhancement and L2 Collocation Acquisition | 第33-36页 |
| 2.2.2 Task Load Involvement Hypothesis and L2 Collocations Acquisition | 第36-38页 |
| 2.3 Related Studies at Home and Abroad | 第38-45页 |
| 2.3.1 Studies on Input Enhancement | 第38-40页 |
| 2.3.2 Studies on Task Load Involvement | 第40-41页 |
| 2.3.3 Studies on Collocation Acquisition | 第41-45页 |
| Chapter 3 Research Methodology | 第45-55页 |
| 3.1 Research Hypotheses | 第45-46页 |
| 3.2 Research Questions and Aims | 第46-48页 |
| 3.3 Research Design | 第48-55页 |
| 3.3.1 Participants | 第48-49页 |
| 3.3.2 Instruments | 第49-50页 |
| 3.3.3 Procedure and Material | 第50-55页 |
| Chapter 4 Results and Discussions | 第55-85页 |
| 4.1 Results | 第55-70页 |
| 4.1.1 An Overall Picture of Acquisition of Target Collocations | 第56-60页 |
| 4.1.2 Acquisition of the Target Collocations Under the Effect of Enhanced Input | 第60-62页 |
| 4.1.3 Acquisition of the Target Collocations Under the Effect of Task Load Involvement | 第62-63页 |
| 4.1.4 Interactive Effect between Input Enhancement and Task Load Involvement | 第63-67页 |
| 4.1.5 Production of Collocations in Writing | 第67-70页 |
| 4.2 Discussion | 第70-85页 |
| 4.2.1 The role of Input Enhancement | 第70-75页 |
| 4.2.2 The Role of Task Load Involvement | 第75-81页 |
| 4.2.3 Interactive Effect between Input Enhancement and Task Load Involvement | 第81-85页 |
| Chapter 5 Conclusion | 第85-89页 |
| 5.1 Major Findings and Implications | 第85-87页 |
| 5.1.1 Major Findings | 第85-86页 |
| 5.1.2 Implications for L2 English Collocation Teaching | 第86-87页 |
| 5.2 Limitations and suggestions for further study | 第87-89页 |
| Bibliography | 第89-97页 |
| Appendix Ⅰ Vocabulary Level Test | 第97-101页 |
| Appendix Ⅱ Pre-test Paper | 第101-103页 |
| Appendix Ⅲ Post-test Paper | 第103-105页 |
| Appendix Ⅳ Four Versions of Reading Materials | 第105-111页 |
| Paper Published During the Study for M. A. Degree | 第111页 |
