Idiom

i dont have idioms but i have words

Instead of test, use assesment/questionaire.
instead of mental, use cognitive (excercise improves ur cognitive abilities)
instead of mixed feelings, use ambivalent
instead of impulsive/unpridictable, use capricious
instead of odd/not normal, use anomaly
use punctuation and grammar when u dont need to
i have more jus reply i can provide it.

The man sat down.

My cat ate a dog.

Let me help you learn the ropes on essay writing

I don't know any, sorry... XD