(x+2)(x+3)(x+4)-x^2(x-5)=6               Tìm x: 

13.Mary sings………………….Susan does (beautifully)                                      A. beautifully   B. more beautifully C. the most beautifully D. more beautifully than                                                                                                                14.Ted speaks English……………………..of all (fluently)                                  A. more fluently B. most fluently C. the most fluently D. fluently                         15.Sally got………………….. food on the menu for dinner last night (expensive). A. the most expensive B. most expensive C. more expensive D. expensive                                                                                                     16.The Wilsons arrived at the party………………….. of all (early).                  A. earliest B. the earliest C. the most early D. earlier                                                                17.Ali speaks…………………….. I do (loudly) A. loudlier B. more loudly C. loudly D. loudier                                                                                          18.My sister works……………………..I do (hard) A. harder B. more hard C. more harder than D. harder than                                                      19.February is …………………..month of the year. (short) A. the shortest B. the most shortest C. shorter D. shorter than                                                 20.In my opinion, Harry’s Steak House is………………….. restaurant in the city (bad). A. the worst B. the worse C. the bad D. the most