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How to quote a tweet 
Copy the content of the tweet you'd like to share and retweet it. 
Because this only works if the tweet is much shorter than 280 characters, it's recommended that you use the official retweet button instead. Still, this is an effective method of quoting and reposting a tweet.
After you've copied the content, open a new tweet box and paste the content into the message. Add the letters rt and the tweet author's @username.