11. Mary is ______ responsible than Peter.

A. more                              B. the most                        C. much                             D. as

12. She is ______ than any other students in my class.

A. most hard-working                                                  B. more hard-working

     C. the most hard-working                                                                                       D. as hard-working

13. He drives ______ his brother.

A. more careful than                                                     B. carefully than               

C. as careful as                                                             D. more carefully than

14. Tuan writes more ______ with fewer mistakes than the previous term.

A. careless                         B. careful                           C. carefully                        D. carelessly

15. The weather today is ______ of the month.

A. hot                                B. hotter                            C. the hottest                     D. more hot