THIS DRESS IS THE __________ EXPENSIVE OF THE FOUR DRESSES.A. BEST...

6. - 500 CAU TRAC NGHIEM THI VAO LOP 6 MON TIENG ANH
500 CAU TRAC NGHIEM THI VAO LOP 6 MON TIENG ANH

6. This dress is the __________ expensive of the four dresses.

A. best B. more C. most D. as