YOU SAID:

The dog of my friend that is very tall ate a piece of paper which wasn't that tasty.

INTO JAPANESE

私の友人のとても背の高い犬が、あまり美味しくない紙を食べました。

BACK INTO ENGLISH

My friend's very tall dog ate a piece of paper that didn't taste very good.

INTO JAPANESE

私の友人のとても背の高い犬が、あまり美味しくない紙切れを食べてしまいました。

BACK INTO ENGLISH

My friend's very tall dog ate a piece of paper that didn't taste very good.