Read the following passage and choose the best answer to each question. HANG SON DOONG I’ve always been someone who seeks out adventures, so imagine my excitement when I found out that my trip to Vietnam would (20) _____ with the opening up of the world’s largest cave to visitors for the first time. Only discovered in 1990 by a local man, (21) _____ by accident, the cave wasn't located again until 2009. (22)_____to say, I was awe-struck at the mere thought of touring a cave this large - it is 2.5 miles long and so high that it could (23) _____a40-storey skyscraper! My adventure began in style with a night camping in Hang En cave, which has thousands of swallows nesting overhead. The next morning, we trekked through (24) _____ pristine jungle to the entrance of drop into the darkness before swimming along a fast-following river. The cave is so huge that there are wispy clouds near the ceiling. As we approached a massive skylight that lit up the cave, a huge stalagmite that looked just like the paw of a dog came into (25) _____. This tour certainly isn't for the (26) _____ of heart, but really there is nothing to be afraid of. Our guides were extremely knowledgeable, professional and safety (27) _____. I've never had such an amazing ad venture! (On Screen- C1) 20. A. coincide B. occur C. match D. correspond 21. A. exactly B. only C. practically D. purely 22. A. Worthless B. Needless C. Useless D. Pointless 23. A. fit B. contain C. include D. enclose 24. A. dense B. heavy C. concentrated D. rich 25. A. range B. glimpse C. view D. vision 26. A. bad B. slight C. mild D. faint 27. A. conscious B. sure C. informed D. wise