Giải thích giúp em với ạ Trang An is a famous tourist complex located in Ninh Binh province in the north of Viet Nam. It is an important national heritage and has been a UNESCO World Heritage site (1) _____ 2014. Among the diverse ecosystems, forests and limestone mountains (2) _____ with the history of the ancient capital of Hoa Lu, Trang An Grottoes are Viet Nam's most spectacular sights. The scenery here is just (3) _____. Trang An Grottoes are a gathering of 31 valleys, 50 cross-water caves, and home to 600 kinds of flora and over 200 kinds of fauna, many of (4) ______ are in the Red Book of Viet Nam. While rowing through Trang An grottoes in the quiet, fresh air of the highlands, with only the sound of birds and the oars stirring the clear water, you will (5) ______ that you are in a paradise on earth. Many foreign tourists say that Trang An is truly a great wonder of Viet Nam. 1.A.for B.since C.in D.through 2.A.associated B.linked C.contacted D.joined 3.A.incredible B.artificial C.unreal D.untrue 4.A.them B.which C.what D.that 5.A.know B.understand C.consider D.see