I've got similar homework. It's sometimes pretty difficult to tell the difference between the complement and the adverbial... I know that the adverbial "gives us extra detail about clauses" - basically it's place, time or manner. Equally, however, the complement is defined as being " the part of the sentence that gives you more information about the subject (a subject complement) or the object (an object complement) of the sentence".
You're right with the subject/object/verb I think - and both the subject and the object are just the verb, not including the adjective. Number 4 really has me stumped as well. I assume the subject is the rate...Also, in this piece of homework there're a few sentences which don't appear to have any adverbial/complement...weird.
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I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.