Answer:
let us not wallow in the valley of despair.
Thesis main idea -supporting details elements
Frederick Lucas said that the preamble did its job in setting the tone of the document and makes it clear why the Founding Fathers wrote it. Hope this helps.
Answer:

Explanation:
The dove made its nest in the bushes.
⇒ No imperative tone (used in commands)
⇒ No interrogative tone (asking questions)
⇒ No exclamatory tone (Feeling of surprise, indicated by !)
Answer:
We were at a disadvantage <em><u>in</u></em><em> </em>that that we weren't too familiar with the language the others were using.
Explanation:
In the given sentence, the correct preposition to be used is "in". This is because "in" will introduce the argument or provide an explanation for the statement before the blank.
With the use of "in", the statement <em>"we weren't too familiar with the language the others were using"</em> provides an explanation for the first statement <em>"[W]e were at a disadvantage"</em>. Whereas the use of the prepositions "by", "with", and "for" are incorrect.
Thus, the correct answer is "in".