1. I heard <u>that </u>trucks can no longer travel on Grove Street.  
A. Adverbial
B. Adjectival
C. Noun ( That is the subordinate conjuntion. )
2. Wrap that meat in foil<u> before</u> you put it in the freezer.  
A. Adverbial
 ( it is an adverbial clause of time. BEFORE, modifies the other clause in the sentence)
B. Adjectival
C. Noun
3.<u> Since </u>I will have a test in Spanish, I went to the language lab.  
A. Adverbial  (this is also an adverbial clause of time, modified by the adverb SINCE)
B. Adjectival  
C. Noun
 
        
             
        
        
        
Queen Elizabeth was the last member of the Stuart line  
        
                    
             
        
        
        
I would say A, and I think you mentioned Independence, but if you didn't then it is D