The first one: only 1 comma
An interjection can be more than one word
Topic sentence. That's just restating your thesis.
Answer:
Explanation: “Thou talk'st of nothing,” Romeo says to Mercutio in order to force Mercutio to end the Queen Mab speech (1.4. 96). Mercutio agrees, saying that dreams “are the children of an idle brain” (1.4. 98).