.Each of the following sentences has one mistake. Identify the letter A, B, C or D

.Each of the following sentences has one mistake. Identify the letter A, B, C or D .

21. Everyone at the party were happy and laugheda lot.

                       A                    B                          C          D

22. The girl said to me that she was  cleaning the floor now.

       A                            B            C                                     D

23. My mother is interesting in reading books, especially novels.

        A              B                C                 D

24. It is  so a difficult question that no one can answer.

A  B                     C                                    D

25. I am learning English since I was 10 years old.

            A                             B           C           D