II. READING

TASK 1. Read the passage. Circle the best answer A, B or C to each of the questions.

Located in the heart of the UNESCO - listed Phong Nha-Ke Bang National Park in Vietnam’s Quang Binh province, Hang Son Doong is one of the most captivating destinations that can be experienced in Southeast Asia.

Translated as Mountain River Cave, it was first discovered in 1990 by Ho Khanh, a local farmer who was seeking shelter from a passing storm in the jungle. Unfortunately, Ho Khanh lost his bearings during his return, and the exact location of the cave remained lost for 18 years. In 2008 while hunting for food he stumbled across the entrance again, and returned the following year with Howard and Deb Limbert from The British Vietnam Caving Expedition Team.

In 2013, it was opened to the public for the first time, with the adventure tour company Oxalis running the exclusive five-day expedition. Limiting the tour to only one operator has protected the cave from mass development. Only 10 customers per departure are permitted. Tours run once per week between February to August per year.

Despite the physical demands guests are perfectly cared for, two caving experts, three local guides, two chefs, two park rangers and 20 porters join every expedition. The scale of the operation is phenomenal, and this ensures everyone’s safety and welfare, along with the preservation of the cave, is looked after with expert precision.

How did Ho Khanh rediscover the entrance to Hang Son Doong in 2008?