For Sindhi, you can read Akbar Lagahri's Sindhi Adab Jo Mukhtasir Jaizo OR Dr Abdul Jabbar Junejo's Sindhi Adab Ji Muktasir Tareekh. I am not sure whether you are asking for Sindhi General which is compulsory in CCE or History of Sindhi literature which is an optional paper.
For Islamic History, go through Mazar-ul-Haq's book. It is a good book if you have Islamic History paper 1 as optional.

As far as screening test is concerned prepare your mcqs from different sources i.e., books, internet and newpapers.