Read the passage and fill in the blank
Ha Long Bay is a beautiful natural wonder in northern Vietnam near the Chinese border. The Bay is dotted (1) ____________ 1,600 limestone islands and islets and covers (2) ____________ area of over 1,500 sq km. This extraordinary area was declared a UNESCO World Heritage Site in 1994. For many tourists, this place is like something right out of a movie. The fact (3) ____________ that Ha Long Bay features a wide range of biodiversity, while the surrealistic scenery has indeed featured in endless movies. The best way (4) ____________ to Ha Long City is by car, minibus or bus from Hanoi which is only 170 km away. If budget is not a problem, an hour-long helicopter transfer is also available.
Question 1: