True, key words are the main words in a sentence.
Allusion is the type of figurative language used here, I believe.
Answer:
The most important to us would probably be the obelisks.
Explanation:
They help us understand the daily life of the ancient Egyptians. Obelisks are monuments that Pharaohs made for themselves so that after they died, then they would be remembered.
They can't pass the exam unless they "study" hard.
Answer:
C. Set aside a special time for writing and during that period, do nothing but write.
Explanation:
Hope this helps.