Choose the correct answer

Indentify underlined word/phrase (A or B, C, D) that needs correcting:
1. He can remember to be in the hospital when he was four
           A                       B     C                                     D
2. You should participate to the recycling program
               A                        B            C             D
3. I was listening to music when he was watching film at 10 pm yesterday.
               A                            B                  C                  D
4. Nexy I'd like you to make the grammar exercises on page 10
                   A          B    C                D
5. She ate all the chocolates - there are no in the box
             A                 B                              C  D