Which sentence correctly compares two items using the comparative form?

Select the adjective that forms the superlative by adding '-est'.

Which is the correct comparative form of the adjective 'happy'?

Choose the correctly completed sentence: 'This math problem is _____ than I expected.'

Which of the following sentences is correct when comparing three or more things?

What is the correct comparative form of the adjective 'good'?

Which sentence is incorrect?

Choose the comparative form of 'far'.

Which pair of words shows the correct comparative and superlative forms of 'little' (meaning small)?

Select the correct comparative form for the adjective 'dangerous'.