$\text{A.}$ 

$\text{1.}$ T

→ Dẫn chứng : Phong Nha - Ke National Park is a UNESSCO World Heritage Site , located in the Bo Trach and Minh Hoa Districts .... 

$\text{2.}$ F

→ Travelers should take a boat ride through undergrounddrivers .... 

$\text{B.}$ 

$\text{1.}$ Phong Nha - Ke Bang is famous for its caves  systems . 

→ Dẫn chứng : Phong Nha - Ke Bang is famous for its caves  systems .  

$\text{2.}$ There are 300 caves in Phong Nha - Ke Bang . 

→ Dẫn chứng : It has 300 caves with a total length of about 70 km ... 

$\text{3.}$ Yes,it does .

→ Dẫn chứng : The park contain many fascinating rock formations and Ke Bang forest. 

$#Keisha$