语法填空In 1940, four teenage boys and their dog were walking through the woodland c

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语法填空

In 1940, four teenage boys and their dog were walking through the woodland close to Lascaux when their dog suddenly disappeared. The boys searched all around. They came to a cave and looked into the cave 【小题1】 could see nothing.

A few days later, the boys returned to the cave. They could hardly believe 【小题2】 (they) eyes. In the weak lamplight, the boys saw red horses and cows, and black bulls and deer covering the walls of the cave, which looked so 【小题3】 (frighten) that the boys escaped in fear. Little did the boys know that they had made one of the most important 【小题4】 (discover) of that century.

The famous Lascaux Cave is made up of a large hole and 【小题5】 series of connecting caves, with a natural water system. The paintings there are an especially important find because they are so numerous and so well protected. After a few years, the caves were opened 【小题6】 a tourist attraction, and 1,200 people per day came to the site 【小题7】 (admire) the paintings. 【小题8】 (fortunate) , a large number of visitors resulted in changes in the caves’ atmosphere, and green algae (藻类植物) began to grow around the walls. Since then, the caves 【小题9】 (close) to the public in an effort to protect the fragile paintings in this precious underground site.

Today, the caves have computer-controlled air-conditioning and are inspected daily. Scientists hope that these precautions (预防措施) can prevent any 【小题10】 (far) damage to the paintings.

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Imagine walking through an ancient city, then climbing a gate tower to take in a wonderful view of the city and its more than 600-year-old walls. You can hear the city's heartbeat in the air. This is Pingyao Ancient City in Shanxi Province, a place that should definitely be on your travel route if you enjoy history or ancient architecture since its origins can be traced back to more than 2,700 years ago.

Located in the center of Shanxi Province, Pingyao is the hometown of Jin merchants, a group of merchants who actively dominated (支配） a booming commodity market throughout China for more than 500 years, especially during the Ming and Qing dynasties. After the founding of the People's Republic of China in 1949, the city's agriculture and manufacturing industries developed rapidly. Following China's reform and opening up, Pingyao struggled for the transition from a managed economy to the current market-oriented economy. During this time, the city government sought out new ways to break through this economic bottleneck.

Finally in the winter of 1997, opportunity came knocking. Through the efforts of the city government, Pingyao earned its place on the UNESCO World Heritage list, which caused the entire world to take notice of the city.

Since the city's fame rose, locals in Pingyao have deepened their understanding of the conservation efforts preserving the historical relics in their hometown. Meanwhile the city administration has continued to upgrade itself through a strategy that follows the pillars of "conservation, entrepreneurship, development and protection" .

Currently, the city is focused on establishing a sustainable industry that will enable it to continue to grow while also protecting its relics and introducing them to the world.

【小题1】What does the underlined word "transition" in Paragraph 2 probably mean?