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

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

Question 46: Air pollution, together  with  littering, are causing  many problems  in our large, industrial cities to day.

  A. are                                    B. with                       C. in our large                              D. many

Question 47: I need someone dependent to take care of the children while I'm at work.

  A. care                                 B. children                 C. dependent                                     D. work

Question 48: The sign says that we should read the constructions carefully before proceeding.

    A. should                              B. says                   C. proceeding                  D. the constructions