1-To play/have a(n) important/key/vital/crucial role in (doing) sth: to play an important part in sth Eg: University education plays a crucial role in improving the quality of human workforce. 2-To make significant/substantial/valuable/ great/outstanding contribution to sth Eg: The medical advances have made outstanding contributions to the public’s health care. 3-To solve the problem Eg: Whoever created this problem should solve it. 4-To be key factors influencing something Eg: The number of the vehicles used is the key factors influencing pollution. 5-To reap the benefits (of sth): gain benefit from something/ make the most of something Eg: The customers reap the benefits of globalization. 6- To be a contributing factor: to be one of the main causes of sth Eg: The vaccination program has been a contributing factor in the improvement of health standards. 7-To contribute to sth Eg: Alcohol contributes to 100,000 deaths a year in the US. 8-To gain/derive benefit (from sth) Eg: Many students derived enormous benefit from the course. 9-To have a right to do sth = to be entitled to do sth Eg: Everyone should have the right to freedom of expression. Eg: Full-time employees are entitled to receive health insurance. 10-To benefit greatly/enormously/considerably … from sth Eg: Many thousands have benefited considerably from the new treatment. 11-To have/enjoy/achieve a huge/great success in doing sth Eg: We want all our students to achieve a huge success in the exam 12- To launch a full-scale investigation into sth Eg: The authorities are planning to launch a full-scale investigation into the crash. 13- To meet the need of/demand Eg: The charity exists to meet the needs of elderly people. 14-To fulfil a role/duty/function/ an aim/a goal/an objective/dream/ambition/hope Eg: Visiting Disneyland has fulfilled a boyhood dream. 15-To fulfil a requirement/condition/obligation Eg: Britain was accused of failing to fulfill its obligation under the EU Treaty. 16-To fulfil a promise/pledge = to keep a promise Eg: I’d like to see him fulfill his promise to reorganize the army. 17-To satisfy sb’s needs/demands/desires/requirements Eg: The program is designed to satisfy the needs of adult learners. 18-To have/gain knowledge/understanding of sth Eg: The need to gain knowledge about birth control. 19- To have/make common cause (with/against) Eg: S officials expect other Western governments to make common cause with them over the arrests. 20- To cause somebody to do something Eg: What caused you to change your mind ?