Answer:
Assembly
This is a good word to replace Array. It means gathering. If you want to look for more words to replace Array, look at a Theasurus.
Answer: Look the words up than rephrase the definition of each word that's really all it's say trust me I did theses before in Language arts.
The March on Washington for Jobs and Freedom was the largest civil rights protest in US history, and contributed to the successful implementation of the Civil Rights Act of 1964 and the Voting Rights Act of 1965.
Answer: The student's homework was too difficult to be completed correctly.
Explanation: Lack of apostrophe in students. And randomly adding many didn't make sense to me.