Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.Phong Nha - Ke Bang National Park, _______ by the UNESCO as Natural World Heritage for the crite
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
Phong Nha - Ke Bang National Park, _______ by the UNESCO as Natural World Heritage for the criteria of geology and geomorphology in 2003, is one of the favorite destinations In Vietnam.
A. to recognize
B. to be recognized
C. recognized
D. recognizing