Answer:
"Because we always wanted to go to the zoo."
Explanation:
This sentence is only one clause and needs another -- it's best combined with "Therefore, we piled in the car for a trip to the zoo". They can be rewritten as "Because we always wanted to go to the zoo, we piled in the car for a trip there.", or "We piled in the car for a trip to the zoo because we always wanted to go there."
An alternative is to say "We always wanted to go to the zoo; therefore, we piled in the car for a trip there." A semicolon is used here to separate the two clauses. It can also be written as "We always wanted to go to the zoo, and therefore we piled in the car for a trip there." The first sentence is more 'correct' though.
"there" is used because the word "zoo" has already been used before. Of course, using "the zoo" twice is grammatically correct -- it's just that using the word "there" makes the sentence more natural and less repetitive.
As I understand it, the three witches do not have any control over Macbeth's fate. What they can do is predict the future--and the future is unchangeable. As far as Macbeth controlling his own fate, that is impossible, although that is exactly what he tries to do. It was inevitable that he would murder Duncan. Shakespeare's message in this play is fatalistic. Whatever is going to happen to Macbeth--or to us--is already predetermined. I think this could be the good beginning for your response. The rest can be done by the writers I trust. Check out the site Prime Writings.
A. is the pronoun in the sentence!
