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Laughter [ ] (be / consider) beneficial for our mental health.
Humans [ ] (be / only / species) who have the ability to laugh.
[ ] (why / you / laugh)? - Oh, I’m watching a really good comedy show.
[ ] (laugh) is beneficial when it comes to [ ] (improve) one’s immunity.
If you feel sad, it [ ] (could / be / good) idea to read something funny.