This shell is (very interesting).
Fascinating
This dish looks (very tasty)!
Delicious
This monster is (very big). (2 possible adjectives)
Huge or Enormous
She is (very pretty).
Beautiful or Gorgeous
Your grades are (very good)!
Amazing, Wonderful, Brilliant
The baby has (very small feet).
Tiny
That problem is (very difficult)!
Impossible
It's (very hot)!
Boiling
He looks (very tired).
Exhausted
She is (very angry).
Furious
It must be (very cold)!
Freezing
His grades are (very bad).
Awful or Terrible