Question 29: We might stop here if you don't change your way of speaking. 
      A. We might stop here if you change your way of speaking.
      B. We might stop here if not you change your way of speaking.
      C. We might stop here unless you change your way of speaking.
      D. We might stop here unless you don't change your way of speaking. 
Question 30: At no time Jane asks me when she uses my bathroom. 
      A. Jane is always using my bathroom without asking!
      B. Sometimes Jane asks me when she uses my bathroom.
      C. Jane has no time to ask me when she uses my bathroom.
      D. It is very unusual for Jane to ask me when she uses my bathroom. 
Question 31: There was a 5% drop in the student enrollment of the university. 
      A. The student enrollment of the university dropped by 5%.
      B. The student enrollment of the university dropped in 5%.
      C. The student enrollment of the university dropped to 5%.
      D. The student enrollment of the university dropped for 5%. 
18. Đề thi thử THPTQG 2021 - Tiếng Anh - THPT Quế Võ 1- Bắc Ninh - Lần 1 - có lời giải