Tìm lỗi sai

đây lại là 5 câu  tìm lỗi sai:
19. The books writing by Jack London are very popular in the world.

                 A        B                                  C                               D

20.  That’s the short-sleeved blouse which it was designed by Mai, a very famous fashion designer.

                                  A                         B               C                                                    D

21. Remember to look after your sister careful when we are out.                           

                             A       B                          C                      D

22. I found it hardly to keep my concentration with such a noise going on.

                 A      B                                C                     D

23. Sometimes it takes me about three hours finishing my round.

            A                        B                        C          D

24.  While they met us, we were visiting the Statue of Liberty.

          A              B                 C                  D