Find a mistake in each sentence below

find a mistake in each sentence below
1. I shouldn’t have lost my temple, shouldn’t I?
                             A        B       C           D
2. There is a lot of pollution in Los Angeles.
               A      B          C      D
3. I don’t know what to use this map.
         A               B       C        D
4. Traffic jam has the most serious problem, isn’t it?
                          A            B       C                          D
5. The city cannot build houses enough for all of its people.
                      A       B               C             D