Ha Long Bay is a UNESCO World Heritage Site and popular travel (1)               in Quang Ninh Province, Vietnam. The bay features thousands of limestone karsts and isles in various shapes and sizes. Ha Long Bay is a center of a larger zone which (2)             Bai Tu Long Bay to the northeast, and Cat Ba Island to the southwest.

      Ha Long Bay has an area of around 1,553km², including 1,960 - 2,000 islets, most of (3)_____ are limestone. The core of the bay has an area of 334km² with a high density of 775 islets. The limestone in this bay has gone through 500 million years of foundation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years (4)                       the impact of the tropical wet climate. The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. Ha Long Bay is (5)            to 14 endemic floral species and 60 endemic faunal species.

1.   A. situation                  B. destination               C. direction                  D. ground

2.   A. offers                      B. includes                   C. consists                    D. covers

3.   A. that                          B. those                        C. which                      D. whom

4.   a. in                              b. of                             c. for                            d. under

5.   a. way                          b. place                        c. home                        d. house
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