The 3rd question is the easiest to answer:
Tell me and "give me" makes a parallel structure.
where and "what" could be the right answer too,but "what you account of" does not make sense."Account" as a verb works with "for" and "as".
The 4th question actually points out a typical grammar point in SAT.The order of two actions "plead and agree" could be shown by using "have done and did" structure.Make your life easier and just remember this structure.
For the 1st one,the answer is mainly determined by the meaning of the sentence.Make sure you understand the meaning of all nouns in the sentence and also clarify the relation bwn them.
The 2nd question shortens the sentence by deleting "which is" after "archi",so just add "which is" and see the answer~