The United Kingdom, Great Britain, Britain, England—many people are     1     (confuse) by what these different names mean. So what is the     2     (different) between them, if any?     3     (get) to know     4     little bit about British history will help you solve this puzzle.

In the 16th century, the nearby country of Wales was joined to the Kingdom of England. Later, in the 18th century, the country Scotland was joined     5    (create) the Kingdom of Great Britain. In the 19th century, the Kingdom of Ireland was added to create the United Kingdom of Great Britain and Ireland.     6    (final), in the 20th century, the southern part of Ireland     7     (break) away from the UK, which resulted     8     the full name we have today: the United Kingdom of Great Britain and Northern Ireland. Most people just use the shortened name: “the United Kingdom” or “the UK”. People from the UK are called “British”,     9     means the UK is also often     10     (refer) to as Britain or Great Britain.

When scholars of international relations predict that the 21st century will be a “Chinese century”，they are full of reasons.     1    America remains the only superpower, China is responsible for an important share of global change. Since the start of the    2     (finance) crisis in 2008, for example, China has accounted     3     45% of the gain in world GDP. In 1990 about 750 million Chinese people lived in extreme     4     (poor); today fewer than 10 million do. Its GDP per person, in terms of purchasing power，    5     (rise) ten times since 1990.

China’s     6     (amaze) performance has greatly affected the world’s economic output.The Economist has worked out a geographic center of the global economy by taking an average of each country’s latitude and longitude (经纬度),     7     (measure) by     8     (it) GDP. At the height of America’s control, this point previously sat in the north Atlantic. But China has pulled it so far east    9    the global center of economic gravity    10     (be) now in Siberia.

Peru is a country on the central western coast of South America facing the Pacific Ocean. Three parts make     1     the country: narrow, dry, flat land     2    (run) along the coast, the Andes Mountains, and the Amazon Rainforset.

Spanish is the main official language of Peru. It is because Peru     3    (rule)by Spanish from the 16^th century to 1821. But before that, Peru was the center of the ancient Inca Empire, and its emperor lived in what is now known as the site Machu Picchu.

Peru is an     4    ( amaze) destination with something for tourists. Here     5    (be) two magical tours: Amazon Rainforest and Machu Picchu Tour.

In Amazon Rainforet Tour, you can first take     6     short flight into the Amazon rainforest and then will travel for a day to your     7    (accommodate) by boat. In the following three days, you can explore the unique rainforest with a local guide, In the other tour, you can take a four-day hike through the Andes to the city of Machu Picchu. After     8     (explore )the ancient city, you will find it very fantastic,     9    (especial) the Incas’ dry stone method of building. Inca builders cut stones so exactly     10    nothing was needed to hold walls together.