1. Wrong: as clear as a crystal.
Correct: as clear as crystal.
2. Wrong: as hard as the iron
Correct: As hard as iron.
3. Wrong: as smooth as the glasses
Correct: as smooth as glass.
4. Wrong: as safe as a bank.
Correct: as safe as the bank.
5. Wrong: as silent as a grave
Correct: as silent as the grave.
6. Wrong: as hot as the furnace.
Correct: as hot as a furnace.
7. Wrong: as light as the feathers.
Correct: as light as a feather.
8. Wrong: as wise as a owl.
Correct: as wise as an owl.
9. Wrong: as sure-footed as the goat.
Correct: as sure-footed as a goat.