1    (cover) an area of about 14 million square kilometers around the South Pole, Antarctica is     2    fifth largest continent in the world. It holds 90% of the world’s ice and most of its fresh water is in a frozen state. Due to its extreme climate, it can’t be a     3     (bad) place to live in. However, there is still a variety of wildlife living there.

Because of the ice, gases and minerals, in the form of volcanic dust     4     (trap) in the ice, and rocks, it has become a source of information for researchers about the past and the climate in past ages. But Antarctica was the last continent       5       (discover). It was on 11th December, in 1911     6     the Norwegian Roald Amundsen finally reached the South Pole.

In 1961, to prevent the commercial and military use of the continent, to keep it free     7     nuclear tests and radioactive waste, to promote international     8     (science) projects and to end arguments about who owns the land, a treaty     9     (sign) by 12 countries. Today scientists from many countries travel to Antarctica to study its     10     (resource).

Shortly after dawn, the 680-year-old Lion Grove Garden wakes up to the sound of birds and its moist air is suffused with ascent. With a view of pavilions, early     1     (visitor) to this garden in downtown Suzhou, can feel     2     sense of Zenlike inner peace.

When monks during the Yuan Dynasty first constructed this garden, they may have wanted to enjoy a quiet retreat. But this charming garden has attracted celebrity guests,     3     have left poems, paintings and     4     (history) anecdotes in the following centuries.

“In recent years, we’ve tried     5     (restore) the landscapes of classical gardens, but a delicate garden cannot be an empty shell,” says Bai Lingzhi, deputy director of Suzhou Administrative Bureau of Garden and Landscaping. “We need creative ideas to lead people to the lifestyle     6     (advocate) by the gardens in the era,” she explains.

Last year, a new project was launched,     7     (allow) tourists in small groups to reserve places to enter the garden in the early morning before the regular opening time. Their visit ends up     8     making a traditional folding fan.

In 1997 and 2000, nine of the best-known classical gardens of Suzhou     9    (register) onto the World Heritage List. As UNESCO remarks: “Classical Chinese garden design, which seeks to re-create natural landscapes in miniature, is nowhere     10     (well) illustrated than in the nine gardens.”