Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 41 to 45.

If you are interested in having a trip of a lifetime, but also doing something useful at the same time, then why not try joining a Greenforce expedition as a volunteer. Greenforce, ___(1)___ was set up in 1997, is an international research agency that gathers information about wildlife and natural habitats in various parts of the world. There is a qualified biologist in charge of each team of volunteers and these carry out surveys all year round in some of the world remote and most beautiful places. Volunteers come from all walks of life. No previous experience is necessary as Greenforce provides full ___(2)___ in animal identification and survey methods. However, you will need to be a person who enjoys the outdoor life ___(3)___ working in remote locations can be challenging. You’ll also need to be passionate about wildlife and prepare to learn a lot about the place you visit. ___(4)___ expedition lasts for ten weeks, and training begins in the UK with a residential weekend where you can get a taste of expedition life and meet up with some of your teammates, as well as learning about first-aid and basic survival skills. Each volunteer ___(5)___ £2,550 to the total cost of the expedition, but past volunteers say it is worth every penny.