Answer:
4. Shakespeare’s first tragedy, Titus Andronicus was a big hit; today however it is not regarded highly.
Rule: If you take out "Shakespeare’s first tragedy," the meaning of the sentence stays the same. The meaning of the sentence is that Titus Andronicus was a big success, but it’s not anymore.
5. The tsunami ravaged Sri Lanka, where hundreds of people lost their lives.
Rule: Removing "where hundreds of people lost their lives" does not change the meaning of "the tsunami ravaged Sri Lanka." By adding a comma after Sri Lanka, it will start a new nonrestrictive sentence.
Explanation:
Details in the answer...
