Speed:
* Quickly: She read the letter quickly.
* Slowly: He read the book slowly, savoring each word.
* Rapidly: The children rapidly devoured the storybook.
* Hurriedly: She hurriedly scanned the news article.
* Carefully: He carefully read the instructions before assembling the furniture.
Manner:
* Silently: She read silently in the library.
* Aloud: He read the story aloud to his children.
* Fluently: She reads fluently in both English and French.
* Loudly: The teacher read the poem loudly to the class.
* Softly: She softly read the bedtime story.
* Intently: She intently read the letter, trying to decipher its meaning.
* Compulsively: He compulsively read every newspaper article about the scandal.
* Passively: He passively read the magazine, not really paying attention.
Emphasis:
* Thoroughly: She thoroughly read the report before making her decision.
* Completely: He completely read the book in one sitting.
* Carefully: She carefully read the contract before signing it.
* Scrutinizingly: He scrutinizingly read the document, looking for any inconsistencies.
* Critically: She critically read the article, evaluating its arguments.
Other:
* Again: She read the letter again to make sure she understood it.
* Once: He read the book once and then passed it on.
* Frequently: She frequently reads books by her favorite author.
* Regularly: He regularly reads the news online.
The best adverb to use will depend on the specific context and what you want to emphasize.