Which of the following sentences contains mistakes?

Which of the following sentences uses an adjective to describe a noun?

Check the item that correctly displays a synonym for the underlined word.

Harper Lee’s “To Kill a Mockingbird” presents diverse social issues, but mainly:

Assinalar a alternativa em que, de acordo com a norma-padrão da língua inglesa, NÃO há erros:

The text is structured as a letter, giving the book one important characteristic, which is:

Mark the CORRECT item to fill in the blank. They ______ their house painted before they moved in.