阅读下列短文,从每题所给的A、B、C和D项中选出最佳选项。
Most
people have heard of the Great Wall, but not many people outside China know
about the Grand Canal. This man-made waterway is known to the Chinese as the
Beijing-Hangzhou Grand. Canal. It is the longest as well as one of the oldest
canals in the world and a place of interest. It's 1,797 kilometres long and
some parts of it are more than 2,000 years old. Starting from Beijing, it
passes through Tianjin and the provinces of Hebei, Shandong, Jiangsu and
Zhejiang to the city of Hangzhou. The Grand Canal links the Yellow River and
the Yangtze River.
It
was built as a way to transport grain from the rich agricultural land in
China's south to cities in the north. In fact, it's not one canal, but a system
of canals and rivers linked together. It's still an important part of the transport
system in China. Thousands of ships use it every day to transport grain and
many other types of goods.
The
Chinese government has done new work on the Grand Canal. It has made Darts of
it deeper, so bigger ships can use it. The canal also helps to move water.
There is a lot of rain in the south of China, but not as much in the north. The
canal can carry millions of liters (公升) of water from the south to the north.
The
Grand Canal is much less famous than the Great Wall, and not very many tourists
visit it. But it's possible to go on a cruise (乘船游览) along some of the oldest parts of the
canal. Passengers on these cruises can see beautiful parts of China that other
visitors don't see.