MARK THE LETTER A, B, C OR D ON YOUR ANSWER SHEET TO INDICATE THE CORRECT ANSWER TO THE FOLLOWING QUESTION

Câu 9: Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question. He would be always looking _______ his lawn or his flowers and Paul was in the habit of saying a few words to him over the fence. A. over B. up C. after D. on