In June 1992, four farmers near the village of Shiyanbei in Zhejiang Province, China, made a(n)     1     (amaze) discovery. When they drained several ponds (排干几个池塘) on their land, they uncovered a secret     2     (hide) under the water’s surface. Five large man-made caves appeared, leading to the discovery of 19 more caves nearby. These caves     3     (know) as the Longyou Caves.

    4     (strange), the caves were not documented in any writings of the period. Following many studies since the caves were first found, caves scientists have tried to put forward explanations of the true purpose behind their     5     (create). But so far none have agreed. Artifacts (人工制品) within were discovered to be from the period 91 to 48 BCE,     6     makes the caves over 2,000 years old. The caves are     7     shockingly good shape after centuries of floods. Interestingly, the caves are of different     8     (size). Some are over 100 feet wide with vaulted ceilings (拱形天花板), supported by stone columns (柱). Others are much     9     (small).

Today, five of the caves are open to tourists, inviting them to experience the great wonders of     10     past.

The Old Town of Lijiang is a few hours bus-ride away     1     the ancient city of Dali in Yunnan Province. Surrounded by fields, mountains and rivers, the Old Town of Lijiang     2     (look) like a jade (翡翠) ink stone in spring and summer. Each year, many foreign     3     (tourist) visit the Old Town, and the place is like “Venice in the East” to them.