Error related to conjunction

31-because she is intelligent  ,therefore she secures highest mark in her class./ne

32-The inspector was doubtful that the man who had been run over by the truck had lain there for more than a day./ne

33-He instructed me that I should do all the work as quickly like  him./ne

34- Seldom or never have i sent a begger away without giving him something./ne

35-Most of the founding fathers of our Constitution are so revered as Ambedkar if not more /no error

36-I don't know if any of the members of the society is conspiring against the chairman or not./ne

37-This is not such a big problem which cannot be solved with some efforts./ne

38-As he is perfectionist, so he always insists on regular practice./ne