Question

Fill in the blank with a suitable preposition.

What are you laughing ______?

• A. of
• B. in
• C. with
• D. for

Answer 1

Answer: (D)

for

In the given question the speaker is asking someone the reason for their laughter. So the preposition of reason should be used to complete the same. The preposition ‘for’ is apt in the given context since it conveys that the person is laughing because of something, and hence there is a reason for the action. Hence option D is correct. ‘Of’ would be unsuitable here because laughter is not a material, cause or origin of anything here. Thus option A is incorrect. Whereas no one can laugh ‘in’ something or ‘with’ something since the verb ‘laughing’ is neither a geographical place nor is it an object that one uses as an instrument. Therefore options B and C are incorrect.