4. I think Bob will graduate a year earlier than _______. (1 point)

he
him !!!!

5. Certainly no one laughed as loud as _______. (1 point)

her !!!!
she

6. Jackie is much taller than ______. (1 point)

me !!!!
i

2 answers

All correct. :)
I disagree, sorry.

Each of those pronouns needs to be in the subject case because of each comparison being made and the understood verb.

... earlier than he (will). [unclear who "he" is, though!]
... as loudly as she (laughed). ["loud" in the original sentence is incorrect ... should be "loudly"]
... taller than I (am).