She travelled (28)........... fifteen other people to the Ruwenzori Mountains in Africa. 1 điểm A. to B. with C. by They went there to help make a road (29)......... a forest between two big towns. 1 điểm A. through B. on C. among 'It was very difficult (30)......... there was no water to drink and no shops where we (31)........ buy food,' said Mary. (Choose the best word for question 30 only) 1 điểm A. so B. because C. why 'It was very difficult (30)......... there was no water to drink and no shops where we (31)........ buy food,' said Mary. (Choose the best word for question 31 only) 1 điểm A. could B. must C. may It is (32)............ of the wettest places in the world. 1 điểm A. one B. some C. any Mary stayed in the mountains (33)................ six weeks. 1 điểm A. for B. during C. since It was hard work, but she says it was the (34)................. thing she has ever (35)............................ . (Choose the best word for question 34 only). 1 điểm A. good B. best C. better It was hard work, but she says it was the (34)............ thing she has ever (35)............................ . (Choose the best word for question 35 only). 1 điểm A. did B. do C. done