The Great Barrier Reef (大堡礁) is one of the seven     1     (wonder) of the natural world. Pulling away from it and viewing it from a greater distance, you can understand why. The reef, between 15 kilometers     2    150 kilometers off shore and around 65 km wide in some parts, is a collection of colorful coral     3     (provide) divers with the most excellent underwater experience imaginable.

A closer encounter with the Great Barrier Reef’s impressive coral gardens presents a number of     4    (extreme) amazing underwater attractions, which include the     5     (large) gathering of corals (珊瑚), coral sponges, rays (鳐鱼), dolphins, over 1,500 species of tropical fish, more than 200    6     (variety) of birds, etc.

The reef is    7     area for humpback whales to breed (繁殖), and is also a habitat of a few endangered species including the Dugong (Sea Cow) and large Green Sea Turtle. In recognition of its significance, UNESCO     8     (list) the Great Barrier Reef as a World Heritage Site in 1981.

Because of     9     (it) natural beauty, both below and above the water’s surface, the reef     10     (become) one of the world’s most popular tourist destinations to date.

These days, modern buildings are everywhere. But if you want to see     1     life was back in the old days, China still has many beautiful water     2     (town) to visit. CNN has chosen four of the country’s most beautiful ones.

The village of Zhouzhuang in Jiangsu calls     3     (it) “the oldest water town in China”. The village, which     4     (build) in 1086, is crossed with canals. Taking a boat ride through town, the red lanterns might make you think of China’s romantic past.

Hongcun,       5     (fill) with lakes and beautiful Anhui-style buildings, is 900 years old. It was built to look like a big ox. Huangshan Mountain is the head；the town is the body and the bridges are legs.

Fenghuang in Human doesn’t look like a bird,     6     its name means “phoenix” (凤凰) in Chinese. The town is as beautiful as the       7       (magic) bird. The stilted (吊脚的) buildings on each side of the Tuojiang River make the area look like a scene from     8     postcard.

While most water towns are in the south, Shangdong’s Tai’erzhuang stands out in the north. The town     9     (be) on the bank of the Beijing-Hangzhou Grand Canal. In the town, there are ancient bridges, a canal and temples,     10     (make) you think of its past glory.