Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

The air conditioner Mary has just bought is very HARD to use.

• A. A. boring
• B. B. difficult
• C. C. simple
• D. D. easy

hard = difficult = khó khăn
=> B
Tạm dịch: Chiếc điều hòa Mary mới mua rất khó dùng