✨ ベストアンサー ✨
1.
(a) The cheetah runs (the fastest) of all animals.
(b) The cheetah runs faster (than any other) animal.
2.
(a) He thinks time is (the most) precious thing.
(b) He thinks nothing is (as precious) as time.
3.
(a) John (is smarter) than any other student in the class.
(b) (No one else) in the class is as smart as John.
(b) (Nobody else) in the class is as smart as John.
(b) (None other) in the class is as smart as John.
ありがとうございます♪