Wang Kun and Wang Wei are brother and sister. They have dreamed of _______ (take) a great bike trip. It was Wang Wei ______ first had the idea to cycle along the Mekong River. They rode bicycles to travel _____ the Mekong River, _____ source is in Qinghai Province. _____ it enters Southeast Asia, it travels slowly through hills and low valleys and the plains where rive grows. Despite _____ difficulties, Wang Kun and Wang Wei were ______ (determine) to begin their journey at an altitude of more than 5000 _______(meter) in Qinghai Province. During their journey, they ______ (enjoy) the continuing change of the weather. Finally, they reached Dali in Yunnan Province, Dao Wei and Yu Hang joined them. The four of ______ went on with their great bike trip.