Choose the letter A, B, C or D to indicate the underlined part that needs correcting in each of the following questions

Choose the letter A, B, C or D to indicate the underlined part that needs correcting in each of the following questions. 

1. Although his family is poor, but he studies very well. 

                                     A             B           C                D 

2. I am very interesting in problems caused by pollution. 

       A                  B                                 C                D 

3. Water  pollution in the lake has made the fish to die.  

       A         B                            C                          D  

4. Because his sickness, he didn’t take part in the English competition. 

         A                  B                       C                                            D    

5. Would you mind not to smoke on the bus? It disturbs the other people. 

                                  A         B                                   C            D 

6. Please arrive on time in order to we will be able to start the meeting punctually. 

                           A                B                                          C                              D 

7. My father used to giving me some good advice whenever I had a problem. 

                                      A                 B                             C               D 

8. As soon as he will come back from his office, tell him to see me. 

                                    A                   B                     C              D 

9. If the factory has a waste treatment system, the water wouldn’t be polluted. 

       A                   B                                              C                                     D                               

10. Hundreds of houses destroyed after a tornado had hit the small town of Texas. . 

             A                            B                                     C              D