Choose the word or phrase that needs correcting

Choose the word or phrase that needs correcting

23. Were I learn Russian, I would read a Russian book.

          A        B                                  C          D

24. If I had studied hard last night, I wouldn't have been so nervous now.

         A        B                                                    C                        D

25. He told me he hasn't finished his work due to his cold.

              A                          B                            C           D