Find and correct the mistake in each sentence

II. Find and correct the mistake in each sentence:
1. He gave me some valuable advices on buying a new house.
           A              B                      C        D
2. I was shock when I got the news that I didn't know what to say.
                A                              B                                   C           D
3.   He got down to writing the letter as soon as he returns from his work.
                A              B                                                   C       D
4. Despite of the roadblock, the police allowed us to enter the restricted area to search for our friends.
        A                                                     B                                        C                               D
5. My family often go to the seaside on Sundays so I get used to enjoy pure air there.
                                                A                   B                                  C                   D