Wang Kun and Wang Wei are brother and sister. They have dreamed of     1    (take) a great bike trip. Wang Wei persuaded his sister     2    (buy) an expensive mountain bike.     3    was Wang Wei who first had the idea to cycle along the Mekong River. They     4    (ride) bicycles to travel along the Mekong River, whose source is in Qinghai Province. When it     5    (enter) Southeast Asia, it travels slowly through hills and low valleys and the plains where rice grows. Despite the     6    (difficult), Wang Kun and Wang Wei were       7    (determine) to begin their journey at     8    altitude of more than 5,000 metres in Qinghai Province. During     9    (they) journey, they enjoyed the continuous change of the weather. Finally, they reached Dali in Yunnan Province,     10    Daowei and Yu Hang joined them.

    1    (Worry) about the time available, Zhang Pingyu had made    2    list of the sites she wanted to see in London so as to leave no worthwhile sites out. Her first delight was going to the tower. It    3    (build) long ago by the Norman invaders of AD 1066. Some buildings had expanded around it. This solid stone, square tower had remained    4    (stand) for 1000 years and still part of a royal palace and prison combined. To    5    great surprise ,Zhang Pingyu found the Queen's jewels guarded by special royal soldiers, who still wore the 400-year-old uniform of the time of Queen Elizabeth 1 on special occasions. The second day the girl paid a visit    6    Greenwich and saw its old ships and famous clock that    7    (set) the world time.    8    interested her most was the longitude line. The last day she visited Karl Marx's statue in Highgate Cemetery. During this visit, she was extremely thrilled by seeing so many treasures from different cultures in the British Museum where Marx had worked, including some beautiful old Chinese    9    (pot ).The next day she was leaving London    10    Windsor Castle for more sightseeing.