Chọn từ sai và sửa lại

1. This is a good car model which is now being advertised on the television every day.
      A                            B                                       C                   D
2. That pagoda was repainting when we visited it last week.
       A                         B               C                              D
3. This exercise is such difficult that nobody in my class can do it.
                          A   B                             C                          D
4. Jenifer was the more hard-working student in our school last year.
                                        A                               B            C         D