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.    

Many people are still in ____  habit of writing silly things in ____ public places.

• A. A. the – the
• B. B. the - 0
• C. C. 0 - the
• D. D. 0 - 0

cấu trúc: be in habit of sth: có thói quen gì
public places là danh từ chỉ chung, không dùng mạo từ
=> D