- THIS FILE IS VERY IMPORTANT. YOU SHOULD INCLUDE IT IN OUR DOCUME...

33. - 2 DE THI THU DH MON THI TIENG ANH VA DAP AN
Tiếng Anh 2 DE THI THU DH MON THI TIENG ANH VA DAP AN

33.

- This file is very important. You should include it in our document.

- I know. It is _________.

A. indispensable

B. indistinct

C. significant

D. optional