Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Question 15: Fans_____BlackPink from various countries have come to Hanoi to watch the performance.
     A. to                                    B. no article                         C. for D. of
Question 16: We must be careful not to do anything that might ________ the economic recovery.
     A. dangerously                    B. endanger                         C. dangerous                                D. danger
Question 17: My mother usually says to me, “The flowers ________ by you every day”.
     A. should water                    B. should be watered           C. water                                        D. are watering
Question 18: Don’t make me ________anything I don’t want.
     A. to do                               B. do                                   C. doing                                        D. to doing
Question 19: I think of three candidates, Ben is ________one.
     A. the most qualified           B. the qualified                       C. most qualified              D. more qualified
Question 20: While I was learning English, he ________for his driving test.
     A. is preparing                     B. was prepared                   C. was preparing                                  D. has prepared