Correct >> My favorite blanket is made of linen.
The plant called buttercup. Correction -->> The plant is called buttercup.
Which one is rare? I want to buy it. <<--- its not that the sentences are wrong. But, they dont really make sense.
Correction -->>Which one of these is rare so I can buy it.
Cleaning room is your foremost thing have to do now .
Correction -->> Cleaning the/your room is of upmost importance.
Teacher told me I have to keep the specimen safe.
Correction -->> The teacher told me that I have to keep the specimen safe.
Hi, i am looking for a note. Correction -->> Hi, I am loking for a notebook.
Which types do you like?
I prefer a leather-bound notebook . Correction -->> I would prefer leather bound. (there is no need to mention "notebook" again as you stated it in your opening sentence.)
Sorry, we just have a half-leather bound notebook. Correction -->> Sorry, we just have half leather bound.
Do not use the phone or you will tumble down the stairs.
She is crying when her cat nippled her face. Correction -->> She started crying when her cat nipped her in the face.
My dog love to nibble its tail. Correction -->> My dog loves to nibble at its tail.
I hope this helps,