Complete the sentences with the words from the box. Use each word once only.
Son Doong Cave became known internationally in 2009 thanks to British cavers.
You are required to have an official permit to access the area.
If something is " inaccessible ", it cannot be reached
Hướng dẫn giải:
internationally: quốc tế
permit: giấy phép
inaccessible: không thể tiếp cận được