YOU SAID:

With many bitter sidelong looks and some sullen muttering, the class opened their books. Why does this exist

INTO JAPANESE

多くの苦い流し目ルックスといくつかの不機嫌そうなつぶやき、クラスは自分の本を開きます。この存在がなぜ

BACK INTO ENGLISH

Cranky Tweet more bitter sidelong looks and some shine and open their books to class. This is why