Mark the letter A, B, C, or D on...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

A. something that is easy to do

B. something that is very challenging to do

C. something that is rewarding to do

D. something that is dangerous to do