We should not laugh _________ the poor.

We should not laugh _________ the poor.

Explanation

Laugh is an intransitive verb.

Laugh at someone means کسی پر ہنسنا یا مذاق اڑانا 

Laugh is generally followed by at

We should not laugh at the poor means ہمیں غریبوں پر نہیں ہنسنا چایئے