MARK THE LETTER A, B, C, OR D ON YOUR ANSWER SHEET TO SHOW THE UNDERL...
Câu 33: Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction. (A) The policeman warned us (B) not walking alone (C) in empty streets (D) at night. A. The B. not walking C. in D. at night